Science Video

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Nearly a fourth of the world's mammals are endangered, says an international conservation group IUCN. CNN's Al Goodman reports.

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Pages from an Israeli astronaut's diary, that survived the explosion of the space shuttle Columbia and a 37-mile fall to Earth, went on display on Sunday for the first time at the Israel Museum in Jerusalem. (Oct. 5)

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In the Northern Rockies, beetle infestation and invasive fungus are destroying ancient whitebark pine forests, with serious impacts on wildlife.

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South Korean scientists have released a video of dolphins trying to save the life of a member of their pod.

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G4TV's Adam Sessler joins CNN's Nicole Lapin to preview new games with familiar names hitting the shelves this fall.

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Half a century after NASA was created at the height of the Cold War when the United States sought to prove its superiority by winning the race to the Moon, the space agency faces new challenges ahead.

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NASA's Phoenix Mars Lander has detected snow falling from Martian clouds.

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It is one of the last places you would expect to see snow but NASA scientists say they have detected the white stuff on Mars.

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Penguins rehabilitated with the help of the International Fund for Animal Welfare are released back into the sea.

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A look at weather conditions in the Northeast, updated twice each day.

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Three-day forecast for the entire US, updated each morning and afternoon.

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A look at weather conditions in the West, updated twice each day.

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Western warmth

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For ten years, the Cerro Paranal observatory in the Atacama desert at the north end of Chile has been gazing up at the stars. This European observatory boasts the most advanced technology: four telescopes with 8-meter diameters that are collectively known as the VLT, or "Very Large Telescope." In 2009 they will inaugurate their newest telescope, the Vista.

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Whilst the storm over genetically modified crops is showing no signs of abating in Europe, the issue has not yet raised it's ugly head in Europe. But this looks set to change as critics lash out after the first harvest of genetically modified corn is produced in Cairo.

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The western United States is rich in renewable solar and wind energy, but delivering it to consumers will require huge investments in new transmission lines that could cause serious environmental impacts.

There's wide support for giving federal protection to Snake River headwaters in Wyoming, but farmers downriver in Idaho worry this could mean less water for crops.

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The world's most powerful atom-smasher, the Large Hadron Collider (LHC), began operations on Wednesday in a mission to pierce the greatest secrets of the physical Universe.

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Some scientists suspect that pesticides are the cause of plummeting bee populations, which could have serious consequences for pollination and production of food crops.

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Wildlife officers in Wyoming use sophisticated forensic tools to convict poachers.

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Building new bicycle pathways in Grand Teton National Park could have negative impacts on ground-nesting birds.

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With sage grouse declining across the western United States, researchers try to find out if predatory ravens are responsible.

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Conservationists say the common types of these rodents, essential to healthy grasslands, are threatened by widespread poisoning by ranchers and farmers. U.S. wildlife authorities have been reluctant to give them protection under the Endangered Species Act.