We must not sell ourselves short: Engineering is an honorable profession

I often wonder if people who have been in our profession for a number of years tend to become desensitized to the impact of the work we do as engineers. When immersed in projects on a daily basis, it is easy to lose sight of how our work affects the lives of many. Over the course of the last year, I’ve come to realize we are selling ourselves short and that a healthy reminder of the significance of our work would do us all good.

I was recently talking with my cousin — a piano tuner — about what I do for a living. From her perspective, it was a little unclear. She knew I was an engineer, but didn’t really know what that meant in terms of the specific work I do. When she asked what I do, I asked her if she wanted the 30-minute version or the three-minute version. She enthusiastically requested the 30-minute version, something nobody had asked of me in years.

Not knowing where to begin, I just started talking. I told her about what we do with water: the levee work, the dam work, and how we protect ways of life. I started talking about energy and what we’re doing with solar power, wind power, and power lines. I went into detail about transportation, our developments in rapid transit, and what goes into keeping roads and bridges safe. I’m not sure how long I was talking, but when I was finished, the response I got was, “Wow! You guys do a lot of cool stuff!” It was a simple statement, but it reminded me of the wonderment that prompted me to become an engineer in the first place.

Over the next 10 months, I traveled to more than 50 Kleinfelder offices and noticed a trend among the employees. The non-scientists, non-engineers, and non-architects were displaying the most pride in the work being done. They looked up to those who were coming up with solutions to problems. Even those doing office paperwork felt as though they were part of a team solving the world’s problems. It was the seasoned engineers who seemed too mired in their daily tasks to remember the significance of what they do. I believe we need to be able to take a step back and look at the bigger picture once in a while. The three points below will help us do so.

1) We built this country

The fact that the United States is the world’s foremost economic superpower is largely due to our advancements in engineering and science. Had the Erie Canal not been constructed, westward expansion would have come to a halt and New York City would not have become what it is. Without the knowledge gained from the construction of the canal, life would be unsustainable in much of the country where water is sparse.

American scientists and engineers were the ones who developed an inexpensive way to manufacture steel, which led to the industrial revolution. Along with it came more effective modes of transportation and building, leading to the population and economic booms. Without engineers, our country could not have become what it is today.

2) We make a difference in the world

When we flip a switch, the lights come on. When we turn on the tap, we trust the water is clean and potable. When we drive home from work, we trust the roads won’t collapse. Over the last 100 years, life expectancy has doubled in the U.S., the main factor in which has not been advances in medicine, but advances in clean water technology and sanitation. It amazes me to think of the difference each of our projects makes. We are solving the world’s problems every day.

Take for example my colleague, Jeremiah Jackson. A casual phone conversation with his brother — a journalist in India at the time — led to an innovative solution to remove arsenic from drinking water using not much more than plants and a hand pump, making it easy and affordable for millions of people in remote villages to have purified drinking water. Although this is just one of many projects I could mention, the thought of how grateful the children of these villages are illustrates the difference we make as engineers every day.

3) We get it right

Consider the percentage of products that aren’t quite right. We depend on medicines with side effects and newspapers with daily corrections sections. A recent study even showed IRS agents give incorrect tax advice one-third of the time.

As engineers, what would happen if we were wrong just 2 percent of the time? What would happen to the U.S. if 2 percent of our roads and bridges collapsed, 2 percent of our dams and levees failed, and 2 percent of our drinking water was contaminated with arsenic?

With these three thoughts, I hope to remind all engineers that our country and our world would be completely different places if it weren’t for the work we do every day. Almost every person on our planet has been positively affected in some way by the engineering profession, and we should be proud of that every day we wake up and go to work.

National Geographic Explores Redwood Forest

The National Geographic Channel is presenting a new reality adventure series in the Redwood Forest, as two explorers venture on extreme journey among the world's tallest trees. Explorer: Climbing Redwood Giants debuts on Tuesday, September 29, 2009 at 10 PM ET. The story of the Redwoods is also being featured in the October issue of National Geographic, in “The Tallest Trees.

The Giant Redwoods

The stately Redwoods of Northern California and Oregon are a primeval forest that have been the subject of heated environmental battles for many years. When European settlers arrived in the western states in the the mid 1800s they starting cutting down the giant Redwoods. Today less than 5% of the ancient trees of the Redwood Forest remain. Conservationists continue to battle to preserve the ancient giants.

The new National Geographic series will take viewers along on an extreme adventure, to see the Redwoods from a unique viewpoint. The majesty of the Redwoods can be experienced from the images on the cable television series and in the October issue of the National Geographic Magazine.

Explorer: Climbing Redwood Giants

Explorers Mike Fay and Steve Sillet have each gone on extreme journeys in the Redwood Forest and their adventures have been documented on the National Geographic series.

Conservationist and National Geographic Explorer in Residence Mike Fay walked the entire Redwood Forest in 2007 – 2008. Fay set out to walk the entire range of Redwoods and study the effects of forestry management on the survival of the great trees. Sillet walked on foot through 1,800 miles of Redwood territory. Fay's journey took place over an 11 month period.

Forest Scientist Steve Sillet explored the tops of the Redwoods by climbing the giant trees. Sillet of Humboldt University, is the first scientist to climb up into the canopies of the Redwoods and study their rich ecosystems. Fay climbed the trees with over 350 feet of rope to study the hidden canopy ecosystems of the ancients Redwood Trees..The series will reveals findings that Sillet gathered over eight years of research on the Redwood Forest.

The stories of the explorations of the two men will be told in National Geographic Channel's Explorer: Climbing Redwood Giants. The series premieres on Tuesday, September 29, 2009 at 10 PM ET and will air in one hour episodes on Tuesday nights.

The Tallest Trees

The October issue is featuring the Redwoods as the cover story. The magazine also includes a pull out poster of a full length digital portrait of a stately Redwood Tree. The portrait is composed of 84 images which are stitched together.

The Redwood Forest is a National treasure. The National Geographic Channel series and magazine feature about the Redwoods should help viewers to appreciate the rare beauty of the giant Redwoods

Active Earth

Cool Planet

And what a long, long story it is. Earth is over 4.5 billion years old! When Earth first formed, it didn't have different layers. It didn't have oceans or mountains, either. In fact, you might not have recognized our cool, blue planet. It was just a big, sizzling blob of melted rock.

Slowly, Earth cooled. As it cooled, the heaviest materials, such as iron, sank down. Lighter materials, such as the mineral silica, rose to the surface. Over hundreds of millions of years, the materials settled into three layers.

No one has drilled to Earth's deepest layers yet. Even so, geologists have an idea of what those layers are like from studying seismic waves. Those are waves of energy caused by earthquakes. As they travel through Earth, the waves move quickly through some layers and more slowly through others. Geologists know some layers are made of liquid metal, such as iron. They know others are solid rock.

Core to Crust

To picture Earth's layers, think of a hard-boiled egg. Picture the yolk, the egg white, and the eggshell. Earth's "yolk" is called the core. It's thousands of miles below your feet—and it's hotter than hot! Temperatures in the core can reach over 6,650°C (12,000°F). The core is made of metals—mostly iron and nickel.

Above the core, like an egg white, is Earth's thick mantle. The mantle is made of partially melted rock. Finally, above the mantle is Earth's cool crust—the eggshell.

The crust is our home sweet home. All you can see is part of it—canyons, fields, even oceans. The crust varies in thickness from 5 to 100 kilometers (3 to 62 miles). That may sound thick, but compared to Earth's other layers, the crust is thinner than that eggshell.

Giant Jigsaw

The crust may seem rock-solid to you. In fact, it's cracked! Like a jigsaw puzzle, the crust is broken into huge pieces, called tectonic plates. These plates don't stay put. They are always on the move. At first, scientists weren't sure what pushed the plates around. They now believe the answer comes from Earth's core.

The core is like a hot burner. It heats the mantle above. Rock in the mantle gets lighter as it heats up. That causes the partially melted rock to rise. As it moves farther from the core's heat, the rock cools down and then sinks again. This constant rising and sinking makes a slow, circular current.

The plates float on top of it all. The currents push and pull at the plates from below, causing them to move. As the plates shift, they take the continents along for a bumpy ride!

Slow Going

The plates don't exactly zoom along quickly. The fastest-moving plate only moves about 15 centimeters (6 inches) per year. Yet over time, those inches start to add up. Inch by inch, continents are pulled apart and oceans are split.

About 225 million years ago, all the continents were nestled together in a mass called Pangaea. As the plates moved, they slowly pulled the continents apart. Look closely at the east coast of South America and the west coast of Africa. You'll see that it's almost a perfect fit!

That's no coincidence. These continents were once joined. At one point in time, Antarctica was in the tropics. And Australia was in the Antarctic! Talk about topsy-turvy. In 100 million years, Earth's map will look quite different than it does today.

Collision!

As the plates move, they crash into each other like bumper cars. We see and feel the shifting in many ways: earthquakes, volcanoes, mountain ranges—even hot springs!

Most of this action happens at the edges of the plates, where they meet. Plates can meet at convergent, divergent, or transform boundaries. A convergent boundary is where two plates collide. A collision between two continents is a real head-banger. It causes the plates to push upward.

That's what's been happening as India crunches into the Asian plate. The plate carrying Asia has been pushed up. Way up. In fact, the collision has created the towering Himalaya mountains! This huge collision is still going on. As it does, the Himalaya grow taller.

Something different happens when an ocean plate collides with a continental plate. Instead of rising up, the heavier ocean plate takes a dive. The deeper into Earth, the hotter it gets.

Pull and Push

The second type of boundary is called a divergent boundary. That's where two plates move apart. As they split, deep rift valleys form. Volcanoes sizzle as magma, or molten rock, oozes into the gap.

The East African Rift Zone, for example, is filled with volcanoes. Iceland straddles two plates, too. In places, you can peer right into the gap between the plates.

The third type of boundary is a transform fault. That's where two plates slide past each other. This is happening in California. There, the land is split by a deep fracture called the San Andreas Fault.

On the west side of this fault, the Pacific plate creeps north. Earthquakes rattle and shake California as the Pacific plate jerks and grinds along. Guess what's riding on top of it. The city of Los Angeles! In about 29 million years, Los Angeles will slide right past San Francisco.

Ring of Fire

If you really want to catch some plate boundary action, head for the Ring of Fire. That's what geologists call the edges of the Pacific plate. The Ring of Fire is definitely action-packed. In fact, it is home to 75 percent of Earth's active land volcanoes and about 80 percent of the planet's earthquakes.

To see the Ring, check out a map of the Pacific Ocean. Volcanoes cluster all around it! To the north, volcanoes dot Alaska's Aleutian Islands. In the west, Japan and Indonesia shake, rattle, and roll with strong earthquakes and fiery, hot volcanoes.

Closer to home on the Pacific's eastern edge, volcanoes poke out of the Cascade Arc. The Arc covers areas of northern California, Oregon, Washington, and parts of Canada. Here, you can find towering volcanic giants such as Mount St. Helens and Mount Rainier.

Into the Mantle?

We know that Earth's hot, active interior shapes our rocky home on the surface. But deep down, Earth still holds many secrets. Scientists, like those aboard The JR, have barely scratched the surface. They aren't trying to drill to the core, or even the mantle.

Not yet, at least. For now, they just want to reach deep into the crust. By the fall of 2009, they had drilled over a mile into the crust. It'll probably be another 10 to 20 years before scientists reach the mantle. But when they do, it will be a quite a thrilling moment. What will real mantle rock look like? What new things will it reveal about Earth?

There are so many more questions left to answer. Yet until scientists actually reach the mantle, they'll keep asking questions and wondering what's really going on deep down in our planet.

Turtle Travels

Out From the Sand
It's a starry night in August. A clutch of eggs lies hidden more than two feet below a sandy beach. The nest holds more than 100 eggs. Each egg is about the size of a golf ball. Inside each one, there may be a baby green sea turtle.

From the start, what happens to these turtles depends on the environment. The temperature of the sand determines whether sea turtles hatch as male or female. The sand here on Costa Rica's Tortuguero Beach is warm. So more of the hatchlings will be female.

One of the turtles begins to stir inside her shell. She tears at it with her caruncle. That's a sharp point on her beak. Still buried beneath the sand, she breaks free from her shell. Soon, the whole nest is alive with motion.

The baby turtle uses her flippers to climb up and up. It can take more than a day to reach the surface. She moves around, even stepping on top of her nest mates. Their movements help push sand toward the bottom of the nest. This gives the tiny turtles a boost to the top. All at once, the turtles free themselves from the sand.

From the Sand to Sea

The hatchling leaves the nest with many other baby turtles. She heads downhill, toward the horizon. That's where the sky and sea meet. She's drawn to the moonlight reflecting off the ocean. Luckily, there are no lights shining from a nearby street or house. These lights can confuse a baby turtle. They can make it to go the wrong way, away from the sea.

The hatchling's journey to the water is a race for survival. She is no bigger than a walnut. Crabs and night herons snatch up some of the other hatchlings on the beach. This young turtle makes it to the water.

The frothy surf pushes her back. She fights to swim against the breaking waves. Over and over, she dives under the waves, then comes up for air. Her swim continues through the first day and night. The young turtle will not slow down for two days.

To the Open Ocean

Scientists know little about the next phase of a green sea turtle's life. This period is often called the "lost years." A couple days after leaving her nest, the little turtle may reach the open sea. The turtle's journey through the open ocean may last several years. She may move with the currents. Scientists think green sea turtle hatchlings float with mats of sargassum. This seaweed provides a hiding place as well as food.

The hatchling may snack on shrimp, small jellyfish and snails that drift in and around the seaweed. Unfortunately, the sea also contains plastic and trash that people throw away. Eating them could be a deadly mistake for the turtle.

There are many other dangers in the sea, too. Predators such as sharks swim below the small turtle. Large birds fly above. They might decide to make a meal of her.

The turtle gets some protection from the coloring of her shell. The bottom is almost white. Sharks swimming below may not spot her pale shell. It blends into the sunlit water. The top of her shell, or carapace, is dark. From above, the turtle blends into the dark water.

After several years pass, she is a juvenile. Her shell is about the size of a dinner plate. Soon it is time to leave the open ocean for coastal waters.

Growing Up Green

The sea turtle's new home is the warm waters along Floride's east coast. With her larger shell, she is safer in the near-shore waters than she was as a hatchling. Though she sometimes slurps up a jellyfish, she now eats mostly algae and sea grass.

The sea turtle slowly grows larger. Soon she moves to feeding grounds farther off shore where she grows into an adult. There, she eats a sea grass called turtle grass.

At night, the turtle rests in the water under rocks and ledges. She can hold her breath for up to five hours! Each day, she returns to graze on her plot of grass. She uses her sharp beak to tear and eat the young shoots.

Like a lawn mower, the turtle keeps the sea grass pastures cut short. This helps new grasses grow and keeps the pastures healthy. Eating sea grass and algae has turned her body fat a green color. In fact, this is how green sea turtles get their name!

Return to Tortuguero

When the turtle is about 26 years old, her shell is a meter (3.2 feet) long. She weighs around 136 kilograms (300 pounds). Now the adult turtle sets out on a new adventure.

She must return to the beach where she was born to lay her eggs. She begins her long trek back to Tortuguero. She may have to travel over 1,000 kilometers (621 miles) to get there.

Scientists are still learning how sea turtles find their way through the ocean. They think the turtles may sense changes in Earth's magnetic field. That may help the turtles create a kind of mental map. Their memory of chemicals or odors in the water also may help them find their way.

The turtle is well equipped for the journey. Her flippers are like wings. She flies through the water. Using her senses and strong flippers, she finds her way to Tortuguero. There, she finds a mate. A few weeks later, she climbs onto the beach. It is after dark when she arrives.

The Next Generation

Out of the water, she struggles to move on land. She lumbers over the sand. She reaches a place where high tides will not wash away her eggs. Then she starts to dig.

She uses her front flippers to toss up sand. She shifts from side to side until she has a pit wider than her body. She uses her rear flippers to scoop out a smaller hole inside the pit. After two hours of hard work, she is ready to lay her eggs inside the smaller, deeper hole.

Her eggs fall into the deeper chamber, up to four at a time. She lays more than 100 leathery white eggs. She packs sand over them. Then she uses her flippers to toss sand to cover her nest.

In two weeks, the turtle will lay another clutch of eggs, and two weeks later, another. After about two months in the nests, new green sea turtles will hatch. They will begin their own journeys.

Saving Sea Turtles

This sea turtle and her hatchlings face many threats. Not all of them are natural. People hunt and eat sea turtles and their eggs. Many sea turtles are injured by accident, caught in fishing nets or cut by boats' propellers. Turtles also are threatened by water pollution, including plastic and trash. Fortunately, many people are working to help sea turtles survive.

The Caribbean Conservation Corporation (CCC) works to protect sea turtles in Costa Rica and in other parts of the Caribbean. The group puts electronic tags on the turtles and uses satellites to track where they go. You can keep track of where the tagged sea turtles go, too!

Space Junk

Everything seemed normal in space. Astronauts were hard at work on the International Space Station. Suddenly, alarms sounded. Mission Control ordered them to abandon the station. They rushed to the escape pod, where they waited for further orders. What was the emergency?

A small piece of space junk was speeding toward the space station at 28,000 kilometers (17,500 miles) per hour. Mission Control feared it would slam into the station. Ten minutes later, Mission Control sent an all-clear order. Phew! The station was safe.

Space Scraps

This close call happened on March 12, 2009. It wasn't the first time space junk threatened astronauts' lives. And it won't be the last. I know. I've been interested in trash since I was 12 years old. I don't mean the trash that's lying around your bedroom that makes your parents mad. I mean the trash that's littering the space around our planet.

We put a lot of trash in space. Each year, we add more. It's sort of like space trash is out of sight, so it is out of mind. Yet space junk has caused a lot of problems.

The first artificial satellite was launched in October 1957. Since then we have launched thousands of satellites. I used one of them to hunt for black holes. Many are still in orbit. Only one in five still work. The rest are junk. Satellites come in many shapes and sizes. Some are as large as a school bus. Despite their size, most aren't that dangerous. They are large enough to track. We can map where they are.

Space Waste

Burned-out satellites are just one kind of space junk. Rockets streak through space to place satellites there. Usually one section of a rocket ends up staying in space, too.

These once valuable rockets now are part of a growing band of space waste. Many still contain rocket fuel that can explode. If one blows up, it can splinter into hundreds of small pieces. Each one of those small pieces adds to the amount of space junk.

Some space junk already has been smashed into smaller pieces. The United States and the former Soviet Union used to test weapons by destroying old satellites. These target satellites shattered into hundreds of small pieces.

China did the same thing a few years ago. One of its missiles crashed into a large weather satellite. The missile and satellite shattered into many pieces, becoming the single worst case of space littering—ever. So far, scientists have counted more than 2,800 pieces.

Leftover Litter

Space junk even can make more space junk. Just last year, a broken Russian satellite smashed into a working U.S. satellite. What happened? Both satellites exploded into a lot more space junk.

The smash-up littered space with more than 1,600 large pieces and countless smaller ones. Each of these pieces threatens the astronauts who bravely work in space. Each piece could also destroy working satellites.

With each new space mission, it seems like more and more small pieces of space junk pile up. Some of this trash winds up there accidentally. Others are put there on purpose.

Missing tools, lost screws, dropped gloves, and chipped paint all can become space junk. So can regular trash. Russian cosmonauts on a space station threw away trash by tossing it into space. As a result, about 300,000 pieces of space junk larger than one centimeter (about half an inch) now litter space.

Small Scraps, Big Damage

All this trash can cause problems. Objects orbiting Earth the same distance as the International Space Station whip through space at 7.7 kilometers (almost five miles) per second. At that speed, an object the size of a nickel packs the same wallop as a car going 80 kilometers (50 miles) per hour.

This can cause lots of damage. Space trash has cracked windows. It has chipped heat shields. It has ripped holes in solar panels. Nothing orbiting Earth is safe from this debris. Space junk also threatens Earth. On average, one piece of junk falls back to Earth each day. Friction with particles in Earth's atmosphere causes most of this stuff to burn up in the air. Big pieces slam into the ground or splash into the oceans. Luckily, only one person has been hit by falling space junk. She was not hurt.

To protect astronauts and valuable satellites, scientists track space junk. By using radar and telescopes, they can track pieces of trash larger than a grapefruit. This allows scientists to keep tabs on 19,000 pieces of junk. This is only the largest space waste, though. Millions of pieces are much smaller. These small scraps can do big damage. Yet there is no way to know where they are.

Shields Up

What can be done about space trash? A good first step is to make less of it. Scientists are designing tools that are harder to lose. For example, it can be easy for an astronaut to drop a camera lens cap. It's harder to lose the cap if it is tied to a camera.

A rocket can use its leftover fuel. That keeps the rocket from blowing up and making even more trash. Special shields can protect astronauts and spacecraft, too. Astronauts wear spacesuits with a layer of bullet-proof material. This protects them from small pieces of trash, which could slice through their suits.

Collecting Trash in Space

Making less trash and protecting astronauts are only the first steps. We know that the junk already in space is very dangerous. Currently, about 13,000 close encounters take place between working spacecraft and space junk each week. Worse yet, the junk already in space is making more junk. So something needs to be done.

Scientists are looking for ways to clean up space waste. One idea is to shoot lasers at litter. The lasers would move the litter away from working satellites. The only problem is that Earth's gravity would pull the litter back. So the litter would become a problem again.

New spacecraft also can act like garbage trucks. Nets on these high-flying garbage trucks could catch litter and dump it into Earth's atmosphere. The litter would burn up before hitting the ground. Some of the burning trash might light up the sky.

One thing is clear: Scientists must work together to find solutions. No one country is responsible for cleaning up space. Many countries tossed junk into space. Now we have to clean it up so space is safe!

National Geographic Channel and Abu Dhabi Media Company launch world's first free-to-air NGC in Arabic

National Geographic Channel and Abu Dhabi Media Company has announced the formation of a strategic partnership, to launch the free-to-air National Geographic Channel Abu Dhabi - the first international factual entertainment channel to be launched in the Arabic language.

National Geographic Channel Abu Dhabi, which will be dubbed completely into Arabic, will bridge the gap in quality factual entertainment that exists in the region, by reaching out to discerning, educated, thinking audiences that are interested and sensitive about their environment, and are curious to seek more knowledge about the world around them.

Like the work of National Geographic globally, National Geographic Channel Abu Dhabi aims to inspire a life-long passion for learning, to cultivate curiosity and wonder about the world and generate awareness, concern and knowledge about the planet; by offering smart and reliable factual entertainment, featuring science and technology, animals and nature, exploration and culture.

The channel's programming has been expertly designed to meet the preferences of the region's viewers; offering three main themes between 6 pm and 9 pm (UAE) and late night, which will rotate between Nat Geo Science - featuring programmes that unravel the mysteries behind the world, or beyond it; Wildlife - which will incorporate the best and most intimate encounters with wildlife ever seen on television; and MEGA, which will showcase the world's most breathtaking meagastructures, megacities, megafactories and megamovers.

A different theme will be developed for viewers each week under the 'Theme week' slot such as Fight Science, Most Amazing Moments, Food and Travel, where, between 9 pm and 10 pm (UAE), viewers can see some of the greatest, most action-packed and topical programming on National Geographic.
During prime time, 10 pm-12 am, Sunday-Thursday, the channel will showcase programmes based around a different genre each night. Nat Geo Science (Sundays) will feature one-offs like Incredible Human Machine and World's Most Bizarre Dinosaurs; Nat Geo Action (Mondays) will show programmes including Dangerous Encounters, Jet Man and Don't Tell My Mother; Nat Geo Confidential (Tuesdays) will focus on real-life investigations; Disastertainment (Wednesdays) will show programmes such as Air Crash and Seconds from Disaster; while Showcase (Thursdays) will be an open slot showing documentaries about current affairs or grand premieres.Ward Platt, President - Asia Pacific & Middle East, National Geographic Channels International said:

"The launch of the channel in Arabic marks the first time in the Middle East that high quality National Geographic content will be delivered to the region's viewers dubbed into their native language, and also the first time that a National Geographic Channel will be available free-to-air. Our work revolves around the protection of the natural world by bringing information and awareness about the planet to viewers - a philosophy and commitment to environmental sustainability shared by ADMC. We are very excited at this opportunity to together showcase unique perspectives on the world that we inhabit in the Arabic language, and play a part in Abu Dhabi's sustainable growth and transformation into a global media hub."
The launch of National Geographic Channel Abu Dhabi raises the standard of programming and content in the region - through the fact that the content will be in Arabic and free-to-air," commented H.E. Mohamed Khalaf Al Mazrouei, Chairman of ADMC.

"We are very excited to have partnered with National Geographic Channels to not only bring viewers in the region leading global factual entertainment, but to help us expand, enhance and diversify our existing media bouquet - by allowing us to offer something totally new to the Arabic-speaking population in the Middle East"

Viewers can also interact with the channel via a dedicated National Geographic Channel Abu Dhabi website - www.natgeotv.ae. The website will feature comprehensive information on programming including forthcoming feature highlights; an easy-view TV schedule; a variety of online games designed to encourage people to think about the planet; a community section where viewers can 'ask the experts', contribute to online polls or enter competitions; and a video player where viewers can watch programme highlights and reviews.

Globally the National Geographic Channel reaches out to 305m homes in 165 countries, in 34 languages.

How Personal Genomics Could Change Health Care

Several months after deciphering his genetic code last year, Stanford bioengineer Stephen Quake approached a cardiologist colleague. Early analysis of his DNA had flagged a rare genetic variant as potentially linked to heart problems. The variant, in fact, was located in a gene linked to sudden cardiac death in athletes, so physician Euan Ashley suggested Quake visit his office for some follow-up screening. Inspired by that meeting, the scientists spent the next year figuring out how to examine his genome in a way that would be meaningful to both Quake and his doctor.
The result--published today in The Lancet--is the most comprehensive clinical analysis of a human genome to date, highlighting both the medical potential of genomics and the hurdles that remain. "We wanted to try to answer the question of what a physician should do when a patient walks into the office with a copy of his genome and says 'treat me,' " says Quake, who was named one of Technology Review's top young innovators in 2002.
As the cost of sequencing has plummeted in the last few years--from about $3 billion for the Human Genome Project to less than $5,000 today--the number of complete human genomes has blossomed. Hundreds have now been sequenced, though only about 13 have been made public. Scientists are moving their focus from the technical hurdles of sequencing itself to what they say that will be a much more difficult task analyzing the content of genomes to better understand the human disease and the health risk of the individual.
Quake and 13 other "genome pioneers"--a select group who have had their entire genomes sequenced--described their efforts to use their genomes to better manage their health at a conference in Cambridge, MA, this week. The early adopters included James Watson, co-discoverer of the structure of DNA, Harvard professor Henry Louis Gates, Jr., entrepreneur Ester Dyson, 17-year-old Anne West, and a handful of genomics executives.

Despite the complexity and remaining mystery of the human genome--scientists still don't know the function of 90 to 95 percent of human genes--many of the pioneers at the event described using their genomic information to make medical decisions. John West, former CEO of Solexa, a sequencing company that was acquired by genomics giant Illumina, recently had his genome sequenced along with that of his wife and two children. West and his wife discovered they have higher risk of a certain type of glaucoma, which sent them to the ophthalmologist for screening. "Now we know there is something to look for, and the test is easy and relatively inexpensive," he said at the conference. (Daughter Anne presented the results of her analysis of her family's genomes to the illustrious audience.)

Seong-Jin Kim, director of the Lee Gilya Cancer and Diabetes Institute at Gachon University of Medicine and Science, in South Korea, discovered after genome sequencing that he has a tenfold increased risk of macular degeneration, the leading cause of blindness in people over age 60. "I am diligently taking preemptive steps in everyday life to prevent it," he said at the conference. He takes high doses of antioxidants, which have been shown to slow progression of the disease, has regular eye exams, and avoids activities that tend to overexert the eyes. (The scientist is also trying to convince his wife to switch to an LED television, because they may be less damaging to the eyes than LCD.)

While individual genetic tests could have been performed for each of the medical conditions in these cases, the cost of genome sequencing is dropping so quickly that it will soon be cheaper to sequence the whole genome rather than various parts. Quake, who published his own genome sequence, without interpretation, in 2009, can now go back to his genome anytime a new publication describes the possible implications of one of his variations.

In the Lancet paper, Quake and his collaborators undertook a comprehensive analysis of his genome. The researchers focused on variants that had been linked to risk of disease in previous studies, and those thought to play a role in a patient's response to drugs. Beginning with an average risk for a particular disease of someone of Quake's age and background, they added or subtracted risk using the genetic information. "That's the most challenging thing, there is no accepted method for how to do that," says Ashley. "We tried to prioritize what would be the most important thing to discuss with a doctor."

Highlighting just how difficult it is to analyze a genome, Quake points out that it took just a few weeks to sequence his genome, which was published in a scientific paper with three authors. Analyzing the genome for its clinical relevance took a year, and the resulting paper has 20 authors.

The rare variant that led Quake to Ashley's office in the first place provides an illustrative example of the state of genome interpretation. The variant is located in a gene that is well-known to be linked to sudden death. But it turns out that Quake's particular variation is fairly common and present in some healthy people. Combining that knowledge with the results of screening tests--all perfectly normal--led the team to conclude it isn't dangerous. The team also found a completely new variant in that gene, which they haven't yet been able to interpret. "At the moment our tools are relatively limited," says Ashley.

In addition, researchers found variants in other genes linked to cardiomyopathy, a disease that weakens and enlarges the heart, which may help explain a history of sudden death in the family. "Maybe I could have guessed it based on family history," says Quake. "But it's one thing to know there is a family history and another to know I had the allele. That sent me to a cardiologist."

Quake says he hasn't listened to all the medical advice derived from his genome. While he learned that he has a higher-than-average genetic risk for other types of heart disease, he found via the traditional way that physicians use to calculate risk--which doesn't include genetic information--that he's just under the threshold for statin use. Ashley felt the genetic risk factors were enough to put him over the line and suggested he start taking the drugs. "I haven't followed that yet," says Quake. "I'm still thinking about it."

If Quake does start taking the drugs, his genome suggests he will respond to them and is unlikely to suffer one of the drug's more serious side effects, muscle pain.

Some experts are already concerned that widespread genetic testing will lead to unnecessary medical follow-ups, driving high medical costs even higher. But Quake hopes that genome sequencing will ultimately lower costs. "I think this will provide a way to ration health care so that people at risk can get [screening tests] more frequently and those who aren't get it less frequently," he says.

Sculpting a Nano 'World'

IBM researchers have invented a low-cost and relatively simple fabrication tool capable of reliably creating features as small as 15 nanometers. To show off the tool, the researchers at IBM's Zurich lab made a three-dimensional map of the Earth so small that 1,000 of them would fit onto a single grain of salt.

Existing nano-fabrication techniques like electron beam lithography have difficulty making features much smaller than 30 nanometers and are expensive and complex instruments. In contrast, the IBM researchers say their new fabrication tool sits on a tabletop at one-fifth to one-tenth the cost.

The new instrument is a descendant of the scanning tunneling microscope (STM) invented by IBM Zurich scientists in the early 1980s. That microscope made it possible, for the first time, to image and manipulate atoms. The new instrument uses an extremely small silicon tip that is rapidly scanned across the surface of the substrate. The tip is cantilevered like those used in atomic force microscopy (or AFM: an offshoot of STM that was invented in 1986), enabling it to apply nanonewtons of force to the surface. But unlike AFM, the tip is heated.

Where it touches the substrate, the thermal energy at the tip is sufficient to break weak bonds within the material. "We provide enough thermal energy so these molecules become mobile, crawl along the hot tip and evaporate," says Urs Duerig, a scientist IBM's Zurich Research Laboratory, in Switzerland. Together with colleague Armin Knoll and others, Duerig developed the new technique. What's remarkable about this, he says, is that it removes exactly the same amount of the material each time.

The advantage of the new instrument, compared to techniques such as e-beam lithography that involve removing material by bombarding it with particles, is that the effect is more localized. Although e-beam lithography can create features as small 15 nanometers, at resolutions below 30 nanometers, stray electrons tend to cause interactions with parts of the material neighboring the target area.

One advantage of the new technique is that it can bore down into the substrate at different depths, again at very high resolutions. This was demonstrated by etching into a molecular glass substrate a 25-nanometer-high topographical representation of the Swiss mountain, the Matterhorn, with a scale of 1:5 billion. The 3-D image was made by selectively removing material in 120 different layers.

This ability to create 3-D structures is intriguing, says Zahid Durrani at Imperial College London. "It's completely novel," he says. "I've never seen anything like this before." However, as with other probe technologies, extending the process to large numbers of tips operating in parallel is likely to prove challenging, says Durrani.

co-director of MIT's Nanostructures Laboratory, says IBM's instrument is an incredibly "clever and elegant" solution. "They've done something quite creative here," he says. Researchers have long struggled with thermal methods of probe lithography, but it was slow and resolutions were mediocre, says Berggren. "IBM has changed that," he says. "So making sub-20-nanometer-scale lithography available to labs that need it at reasonable cost may be the long-term legacy of this work. And it is a very important one."

In contrast, e-beam lithography requires several steps and tends to be very expensive, with systems costing up to $5 million, says Berggren. The IBM instrument is small enough to sit on a desktop and should cost around $100,000.

It is also relatively fast, says Duerig. Because the tip can write each "pixel" in microseconds, it can be scanned across the substrate very rapidly. The world map, for example, which consists of 500,000 pixels, took just two minutes to draw.

A crucial step in developing this technique involved finding suitable organic substrates. To this end, colleagues at IBM's Research-Almaden, in California, were brought in to help find hard organic substrates that could be used as so-called "resists," a sort of mask used in chip fabrication.

The challenge was to find materials that were tough enough to be used as substrates, but which could be thermally decomposed easily, evaporating into nonreactive chunks when brought into contact with the hot tip. In the case of the world map, a polymer called polyphthalaldehyde was found suitable, and for the Matterhorn, the IBM scientists used a form of molecular glass.

Nat Geo WILD

On Monday, March 29, 2010, Nat Geo WILD hits the airwaves. This new network is the sister station to the popular National Geographic Channel. Nat Geo WILD will bring interesting and unusual programming to viewers who are interested in the animal kingdom. From under the sea to mountaintops, from the arctic to the desert, species of animals are explored in both high definition and standard definition.

National Geographic has been the leader in wildlife programming for over 30 years, and now Nat Geo WILD joins her sister station with all things wild.

Gentle creatures as well as ferocious animals are brought to the screen for viewers to see and to learn about. This is the best way to get up close and personal with all things wild.

Two humans who are part of the Nat Geo WILD team are Casey Anderson, a wildlife naturalist who just happens to have a 900-pound grizzly bear named Brutus for a best friend, and Mireya Mayor, sometimes referred to as the “Female Indiana Jones,” because she treks around the wild looking to find animal behavior that has never been caught on camera before.

All Things Wild

Nat Geo WILD is dedicated to bringing the animal world to the public to educate and entertain. Many species are in danger of extinction, and many have never been studied this closely before. Since it is dedicated to the animal world, Nat Geo WILD is able to focus solely on animals all around the planet.

Nat Geo WILD is a joint venture between Fox Cable Networks and National Geographic Ventures, who also paired to launch the National Geographic Channel in 2001.

At the Television Critics Association Press Tour recently, Nat Geo WILD General Manager Steve Schiffman said, “We expect Wild to be among the largest launches of any new network ever.”

He explained the difference between Nat Geo and Nat Geo WILD. “We are going to have wildlife programming that is 24-by-7, which is a celebration of animals. On the core channel, less than 5 percent of our primetime content has wildlife featured. So it's a very different genre. And we have so much content and so many stories that we want to tell that we felt like having another linear offering, another cable channel, really will allow us to tell those stories that are truly incremental beyond the diversity of topics we talk about in our core channel.”

From monkeys to sharks, bears to birds, the animals of plane earth are explored. This network will bring and enlighten viewers about the animal inhabitants of the planet in a new and exciting format.

National Geographic TV app a disappointment

I love National Geographic Magazine. I love their HD cable channel. I really dislike the free app they have released today for the iPhone.

The app is designed to let you know what the cable channel is airing, and you can certainly browse the schedule. But there is no search option, so finding what you want to watch is a festival of fruitless finger flicking. Not very helpful really.

Then there is a button marked video. Sounds good to me. Tap it and you get a list of videos, like 'Finding the Titanic.' Sounds interesting. Tap it and you are taken to a page that says video 'not available on mobile.' What!!? I tried them all. How many videos played? Not a one. This is a pretty incredible mistake for an app that advertises video. There is even a 'Safari' button, so I thought I could tap that and play the videos in Safari. Not a chance.

There is a blog button, and I read behind the scenes stories about the programs that are so hard to find in the schedule. Some were interesting, and there were some pictures, but you'd think an organization known for some of the most beautiful photography in the world could display some of that in an iPhone app. No, actually, the pictures selected are rather mundane.
Even though this app is free, it seems like a real misfire. Schedules that can't be searched. Videos that can't be played. Pictures that are, well, let's be honest here, uninteresting.

I don't know if Nat Geo is to blame or some developers who should know better. I'd say skip this app until Nat Geo can offer something of value and get its act together. One last comment: Seems like anything from National Geographic would be a must for the iPad. Uh uh. This version is iPhone only, and there is no date for an iPad edition. Of course you could run this app on your iPad and the underwhelming images would get bigger and lose resolution.

I'm just sitting here scratching my head. A reputation is a terrible thing to waste.

Late update from National Geographic: "We're experiencing a glitch with the video feature and are working to fix it ASAP, and I will let you know of the resolution. For your reference, the experience one should have through the video feature is to be able to watch them on his/her iPhone via the YouTube app, with the "back" navigation allowing users to return to NGC app as they wish."

Right.

An even later update: This morning the Nat Geo team told me the video problem was fixed. I tried it and none of the videos played back. Even worse, some of the blogs appear to have embedded video but the video is Flash based, and can't play on the iPhone.

Carry the Moon in your pocket with this free iPhone app

Last week I was pleased to suggest some free astronomy programs of interest to star-gazers. This week, I'm at it again hoping that space or science buffs get a look at Moon Globe.

This very handy app gives you a complete map of our nearest space neighbor, showing you what is visible on any night and from any location. The on-screen display of the moon at the current phase is striking, and very detailed. You can zoom in or out with the usual pinch and stretch moves you are familiar with. It's easy to magnify up to 300 times with stunning detail. With a tap, you will see where spacecraft have landed on the moon and identify surface features like craters, mountain ranges and valleys.

The mosaic of pictures that make up the presentation are seamless, and the app gives you the tools to exactly match what you might see in binoculars or a telescope. That's really helpful, because some telescopes reverse the image left to right, or up and down. You can duplicate those views, so it is easy to match up what you are seeing with the display.

Clicking on surface feature or a spacecraft name will give you some information that is built into the app, or allow you to link directly to Wikipedia or launch a Google search.

There's a lot to like with this app, and with the moon overhead this week, there's a lot to explore. Moon Globe runs on the iPhone and iPod touch, and requires iPhone OS 2.0 or later.

Apple moves into voice technology sector with Siri

Apple yesterday purchased Siri, a US start-up that recently unveiled an application for the iPhone that allows users to complete complex tasks using simple voice commands.

The move will arm Apple with powerful new voice processing and natural language technologies as it battles for smartphone dominance with Google, developer of the fast-growing Android operating system.

"There is an Apple versus Google element to this," said Charles Golvin, an analyst with Forrester Research. "Apple valued this technology and wanted to keep it out of the Android world."

Siri lets users dictate requests into their phones and then delivers results from an array of websites . For example, a user can say "Find me a table for two at an Italian restaurant tonight," and Siri will bring up available reservations from Opentable.com.

In addition, Siri had also established relationships with a host of prominent internet services, such as MovieTickets.com and Taxi Magic, aimed at fulfilling e-commerce needs for users on the go.

This model of taskoriented mobile computing fits into the vision that Steve Jobs, Apple chief executive, recently laid out . "On a mobile device, search is not where it's at, not like on the desktop," he said at the launch of the new iPhone operating system. "[People are] using apps to get to data on the internet, not [for] generalised search."

The deal was disclosed through a pre-merger announcement from the Federal Trade Commission on Tuesday and was expected to close soon. Terms of the deal were not released.

The acquisition is the latest in a buying spree for Apple which recently bought Intrinsity, a chipmaker based in Texas. The deal closed last month and was announced on Tuesday. Terms were not disclosed.

In January, Apple purchased Quattro Wireless , a mobile advertising network, after losing out to Google in a bid to buy AdMob, a rival ad service that Google acquired for $750m last year .

Despite the growing rivalry between the two companies, Apple and Google remain close partners, with Google products enmeshed on the iPhone, iPad and iPod Touch.

Mr Glovin said the acquisition of Siri was part of a gradual distancing between the two companies as Apple develops and acquires more technologies that compete with Google. "What we are going to see Apple do is to loosen those reliances and ties on Google," he said.

MSI GE600: Latest gaming notebook

Notebooks have always been a huge must have, but we all know that not all notebooks are suitable for gaming. Well MSI wanted to change that and it has announced that it will release new gaming notebook named GE600.
The new model has a 16-inch display and it is supposed to be the lightest laptop weighing in at 5.9 lbs or 2.7 kg. So that’s a great plus from MSI, because nobody likes to carry a heavy laptop, but will this laptop have enough to deal with latest games?

This thing is run by Intel Core i5 processor, which will handle all the latest games and applications with ease, but it’s the graphics power that matters when it comes to gaming. As for graphics GE600 uses ATI Radeon 5730 graphics that supports DirectX 11 which is used to run the latest games. As for the power, this notebook is a power saver thanks to the Core i5 which will save up to 15% of your battery, and with its Turbo Boost option it will provide 30% better performance.

As for other specifications this notebook supports 1366×768 resolution and 4 GB DDR3 RAM which will allow smooth ride thought all the applications and games that you might use. 320 GB hard drive is more than enough for all your files. As for software, it comes with Microsoft’s Windows 7 Home Premium 64 bit edition.

With its great specifications this laptop will surely satisfy all your gaming needs and as for the price, it costs around $900.

Europeans can now wet their hands with JooJoo tablet

TechCrunch’s idea of releasing their own CrunchPad? Michael Arrington of TechCrunch dreamt of building a tablet for surfing the web which can be bought for as low as $200. That proved to be a distant dream even when Michael partnered with Fusion Garage to release their dream CrunchPad.

The fallout of Michael Arrington from the CrunchPad left Fusion Garage standing nowhere. Since then they have been trying hard to sell JooJoo tablet (the formerly famous CrunchPad) but evidences prove that they have sold as low as sixty four tablets only up till now. We understand that even Europeans won’t be interested in the €359 (plus €15 for shipping) tablet yet we write for those rare richie-riches who want to shell their money on this.
The 12.1 inches LCD display of JooJoo tablet is pretty impressive but still hasn’t yet impressed the market. It boasts of the Intel Atom processor with processing speed of 1.6 GHz. Graphics will be provided by NVIDIA ION platform and it has the resolution of 1366×768. It runs a custom Linux operating system which lets you enjoy online surfing with a on-screen keyboard. Yeah! This is all that it provides. After all it is made for Internet surfing only!

We suggest that you buy one piece of this device as the company might disappear in next few years (or even months). You would then be able to boast about a unique device which isn’t being manufactured anywhere else (though it would be useless!)

Brain

Making sense of the brain's mind-boggling complexity isn't easy. What we do know is that it's the organ that makes us human, giving people the capacity for art, language, moral judgments, and rational thought. It's also responsible for each individual's personality, memories, movements, and how we sense the world.

All this comes from a jellylike mass of fat and protein weighing about 3 pounds (1.4 kilograms). It is, nevertheless, one of the body's biggest organs, consisting of some 100 billion nerve cells that not only put together thoughts and highly coordinated physical actions but regulate our unconscious body processes, such as digestion and breathing.

The brain's nerve cells are known as neurons, which make up the organ's so-called "gray matter." The neurons transmit and gather electrochemical signals that are communicated via a network of millions of nerve fibers called dendrites and axons. These are the brain's "white matter."

The cerebrum is the largest part of the brain, accounting for 85 percent of the organ's weight. The distinctive, deeply wrinkled outer surface is the cerebral cortex, which consists of gray matter. Beneath this lies the white matter. It's the cerebrum that makes the human brain—and therefore humans—so formidable. Whereas animals such as elephants, dolphins, and whales have larger brains, humans have the most developed cerebrum. It's packed to capacity inside our skulls, enveloping the rest of the brain, with the deep folds cleverly maximizing the cortex area.

The cerebrum has two halves, or hemispheres. It is further divided into four regions, or lobes, in each hemisphere. The frontal lobes, located behind the forehead, are involved with speech, thought, learning, emotion, and movement. Behind them are the parietal lobes, which process sensory information such as touch, temperature, and pain. At the rear of the brain are the occipital lobes, dealing with vision. Lastly, there are the temporal lobes, near the temples, which are involved with hearing and memory.

Movement and Balance

The second largest part of the brain is the cerebellum, which sits beneath the back of the cerebrum. It is responsible for coordinating muscle movement and controlling our balance. Consisting of both grey and white matter, the cerebellum transmits information to the spinal cord and other parts of the brain.

The diencephalon is located in the core of the brain. A complex of structures roughly the size of an apricot, the two major sections are the thalamus and hypothalamus. The thalamus acts as a relay station for incoming nerve impulses from around the body that are then forwarded to the appropriate brain region for processing. The hypothalamus controls hormone secretions from the nearby pituitary gland. These hormones govern growth and instinctual behavior such as eating, drinking, sex, anger, and reproduction. The hypothalamus, for instance, controls when a new mother starts to lactate.

The brain stem, at the organ's base, controls reflexes and crucial, basic life functions such as heart rate, breathing, and blood pressure. It also regulates when you feel sleepy or awake.

The brain is extremely sensitive and delicate, and so requires maximum protection. This is provided by the surrounding skull and three tough membranes called meninges. The spaces between these membranes are filled with fluid that cushions the brain and keeps it from being damaged by contact with the inside of the skull.

Golden Eagle

This powerful eagle is North America's largest bird of prey and the national bird of Mexico. These birds are dark brown, with lighter golden-brown plumage on their heads and necks. They are extremely swift, and can dive upon their quarry at speeds of more than 150 miles (241 kilometers) per hour.

Golden eagles use their speed and sharp talons to snatch up rabbits, marmots, and ground squirrels. They also eat carrion, reptiles, birds, fish, and smaller fare such as large insects. They have even been known to attack full grown deer. Ranchers once killed many of these birds for fear that they would prey on their livestock, but studies showed that the animal's impact was minimal. Today, golden eagles are protected by law.

Golden eagle pairs maintain territories that may be as large as 60 square miles (155 square kilometers). They are monogamous and may remain with their mate for several years or possibly for life. Golden eagles nest in high places including cliffs, trees, or human structures such as telephone poles. They build huge nests to which they may return for several breeding years. Females lay from one to four eggs, and both parents incubate them for 40 to 45 days. Typically, one or two young survive to fledge in about three months.

These majestic birds range from Mexico through much of western North America as far north as Alaska; they also appear in the east but are uncommon. Golden eagles are also found in Asia, northern Africa, and Europe.

Some golden eagles migrate, but others do not—depending on the conditions of their geographic location. Alaskan and Canadian eagles typically fly south in the fall, for example, while birds that live in the western continental U.S. tend to remain in their ranges year-round.

Bald Eagle

The bald eagle, with its snowy-feathered (not bald) head and white tail, is the proud national bird symbol of the United States—yet the bird was nearly wiped out there. For many decades, bald eagles were hunted for sport and for the "protection" of fishing grounds. Pesticides like DDT also wreaked havoc on eagles and other birds. These chemicals collect in fish, which make up most of the eagle's diet. They weaken the bird's eggshells and severely limited their ability to reproduce. Since DDT use was heavily restricted in 1972, eagle numbers have rebounded significantly and have been aided by reintroduction programs. The result is a wildlife success story—the U.S. Fish and Wildlife Service has upgraded the birds from endangered to threatened.

Though their numbers have grown in much of their range, bald eagles remain most abundant in Alaska and Canada. These powerful birds of prey use their talons to fish, but they get many of their meals by scavenging carrion or stealing the kills of other animals. (Such thievery famously prompted Ben Franklin to argue against the bird's nomination as the United State's national symbol.) They live near water and favor coasts and lakes where fish are plentiful, though they will also snare and eat small mammals.

Bald eagles are believed to mate for life. A pair constructs an enormous stick nest—one of the bird-world's biggest—high above the ground and tends to a pair of eggs each year. Immature eagles are dark, and until they are about five years old, they lack the distinctive white markings that make their parents so easy to identify. Young eagles roam great distances. Florida birds have been spotted in Michigan, and California eagles have traveled all the way to Alaska.

Raven

Common ravens are actually rather remarkable animals. These sleek, black birds are excellent and acrobatic fliers on par with falcons and hawks. Such aerial skills are on display during breeding season, when exciting mating rituals include an elaborate dance of chases, dives, and rolls.

These intelligent birds were honored by Native Americans and often portrayed as sly pranksters for their playful nature.

Known as scavengers, ravens are also effective hunters that sometimes use cooperative techniques. Teams of ravens have been known to hunt down game too large for a single bird. They also prey on eggs and nestlings of other birds, such as coastal seabirds, as well as rodents, grains, worms, and insects. Ravens do dine on carrion and sometimes on human garbage.

In winter, common ravens may gather in flocks to forage during the day and to roost at night. During the rest of the year, they are often coupled, or in small groups. Ravens are believed to mate for life. They build large, stick nests in which females lay three to seven eggs each spring. Both parents care for their young, which remain dependent for several months.

Common ravens typically vocalize with a croaking sound, but they boast a wider repertoire of calls.

Ravens are the largest passerine (perching) birds in North America. They were once exterminated as pests thought to constitute a threat to game birds and domestic animals. Today, populations are expanding, and the birds are a familiar sight across the Northern Hemisphere from the icy Arctic to the Mediterranean and in urban areas as well.

The Greatest Predators

Genius Bird

High-Velocity Falcon

Flying Devils

Africa's Birds

Animal Winter Games

Gorilla Fight

Kangaroo Boxing - Attenborough

Ground Squirrels tease a Cape Cobra

Nutters - the monkey production line

Sex Change

Key to long life

Fish and frogs living out of water

Dolphins and humans

Unseen world

Supernatural powers of animals

Pantanal - Brazil

mamba negra

Honey Badger-The Most Fearless Animal on Earth

Talking cats & dogs

Talking Cat

Funny Animals

Real Amazing Animal Hybrids!

FAITH - The Two-Legged Wonder Dog!

Brazilian Amazon

Amazon - Animals

Rainforest Animals

KINKAJOU - RAINFOREST ANIMALS

Ants!

Scientists Find Previously Unknown Sea Creatures

Extinct and Endangered animals