To delete this file, click the file name with your mouse, then right-click and scroll down the menu to the "delete" option. To remove the photo permanently from the desktop, locate the photo on the hard drive and drag it to the trash. Whatever your interest, you'll be entertained and educated with our collection of best-selling DVDs. An impish-looking primate is among species recently deemed critically endangereda€”although researchers also found a species bounding back. The Chuj climbing salamander, a species of dwarf salamander from Guatemala, is another addition to the critically endangered category of the 2011 Red List.The salamanders are found in a limited area of hardwood forest, much of which has been cut for farming and firewood. In addition to the newly critically endangered species, the new Red List boasts a few bright spots.
In honor of April 18, we take a look at how science organizes and names speciesa€”sometimes with a sense of humor. Mountains, wildlife, and wide open skies inspired more than great pictures for our photographer. Indonesiaa€™s Tambora eruption brought on a deadly spate of coolinga€”presaging the costs that come with sudden changes to climate.
New technologies could make it possible to bring extinct species back to life, concludes a paper published on April 4 in the journal Science.
Some, if not all, snakes used to have legs, and now new research suggests snakes lost their limbs by growing them more slowly or for a shorter period of time. The research, outlined in the latest issue of the Journal of Vertebrate Paleontology, strengthens the belief that snakes evolved from a lizard that either burrowed on land or swam in the ocean.
For the study, Houssaye, from the National Museum of Natural History in Paris, and her colleagues analyzed a fossil snake named Eupodophis descouensi.
To better examine the snake, the scientists used a new imagining technique called synchrotron-radiation computed laminography (SRCL). The new 3-D model determined that Eupodophis, in its lifetime, had two small regressed hind limbs and no front limbs. Yet another snake from the same time period, Najash rionegrina, is also thought to have had two small rear legs, strengthening the theory that snakes once had legs and evolved from a lizard with limbs.
Houssaye, however, does not think the case is yet closed as to whether or not snakes evolved from a marine or land-based lizard.
She is, however, hopeful that all of the separate teams working on this puzzle can one day pinpoint what species was the common ancestor of all snakes.

The world’s top felines—including lions, tigers, cheetahs, and leopards—are slipping toward extinction.
Find out what National Geographic Society is doing to save animals all over the world, and learn what you can do to help.
The world of bugs usually escapes our notice, but see them in 3D and a world opens up that you’d never believe existed. By the end of the summer, their new racks are fully grown, ready for sparring in order to win mates.
But local authorities are also working hard to protect a remaining stretch of forest where the amphibians still thrive."It's a classic example of how humans impact biodiversity around the world," Miller said. The future looks bright, for example, for the Arabian oryx, which not long ago nearly vanished forever.The last wild antelope was shot in 1972.
These advances include back-breeding (assembling or reassembling an extinct species' genes), cloning and genetic engineering. Russian scientist Semyon Grigoriev, of the Sakha Republic's mammoth museum, plans to replace the nuclei of an elephant egg with nuclei extracted from woolly mammoth bone marrow.
Loss of habitat and commercial exploitation of the birds for their meat are thought to have killed them all off. With an intense, high-energy beam of X-rays, the SRCL deeply penetrated the fossil as the researchers rotated it.
The leg visible to the researchers was bent at the knee, possessing four anklebones but no foot or toe bones. Although they are seldom seen, they roam throughout much of North America and adapt well to such diverse habitats as forests, swamps, deserts, and even suburban areas.Bobcats, sometimes called wildcats, are roughly twice as big as the average housecat. Choose an image and click the link which matches your screen resolution (Your current resolution is ). For the images in your folders, you may use the desktop wallpaper function provided by the photo management softwares such as ACDSee or Picasa . They exist in a bewildering variety of forms, some more like creatures from an alien world. The result was thousands of two-dimensional images that were later compiled into a three-dimensional model of the ancient snake's hips and ultra tiny .8-inch legs. The high tech imaging further showed that the internal architecture of the leg bones strongly resembled that of modern terrestrial lizard legs.
The fossil snake from Argentina is also thought to have lived on land, since it was found in what was once a terrestrial environment.

They have long legs, large paws, and tufted ears similar to those of their larger relative, the Canada lynx. Big Bad Bugs follows ambitious insect and spider stories, most of them never filmed in 3D before. Whether from physical appearance or its behavior, the spider suffers from a bad reputation, though they are amazingly talented, with a range of abilities that fascinate scientists. Most bobcats are brown or brownish red with a white underbelly and short, black-tipped tail. This Halloween Nat Geo WILD delivers these bugs right to your door, for a guaranteed creepy, crawly night. Tag along the incredible journey of the monarch butterfly, from its wintering grounds in the mountains of Central Mexico, where tens of millions crowd the air, right up into southern Canada. The cat is named for its tail, which appears to be cut or "bobbed."DietFierce hunters, bobcats can kill prey much bigger than themselves, but usually eat rabbits, birds, mice, squirrels, and other smaller game. We visit the violent world of a flowerbed to see lacewings and ladybirds wreaking havoc on herds of aphids. The bobcat hunts by stealth, but delivers a deathblow with a leaping pounce that can cover 10 feet (3 meters).PopulationBobcats are solitary animals. Females choose a secluded den to raise a litter of one to six young kittens, which will remain with their mother for 9 to 12 months.
With more than 40,000 species recorded around the world, the spider is a veritable research subject for international scientists.
During this time they will learn to hunt before setting out on their own.In some areas, bobcats are still trapped for their soft, spotted fur. Join them and make peace with this surprising creature, which from an ecological perspective proves itself indispensable in helping to balance out our planet. North American populations are believed to be quite large, with perhaps as many as one million cats in the United States alone.

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