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LONDON (Reuters) - The collapse of an ice sheet in Antarctica up to 14,650 years ago might have caused sea levels to rise between 14 and 18 meters (46-60 feet), a study showed on Wednesday, data which could help make more accurate climate change predictions. The melting of polar ice could contribute to long-term sea level rise, threatening the lives of millions, scientists say.

By Pauline Askin SYDNEY (REUTERS) - In the pristine frozen continent of Antarctica scientists fear an alien invasion -- not from outer space, but carried in people's pockets and bags. Seeds and plants accidentally brought to Antarctica by tourists and scientists may introduce alien plant species which could threaten the survival of native plants in the finely balanced ecosystem. Invasive alien plants are amongst the most significant conservation threat to Antarctica, especially as climate change warms the ice continent, said a report in the Proceedings of the National Academy of Sciences Journal published on Tuesday.

For years, scientists have warned that climate change is taking its toll on Earth's ice, thawing not just the massive ice sheets of Greenland and Antarctica but mountain glaciers and ice caps from the Andes to the Alps.

It's official. Russian scientists announced today that they have reached Antarctica's Lake Vostok, an ancient, liquid lake the size of Lake Ontario buried beneath more than 2 miles (3 kilometers) of ice for at least 14 million years. [More]

Several Russian news outlets are reporting that Russian scientists have successfully drilled to Antarctica's Lake Vostok , a massive liquid lake cut off from daylight for 14 million years and buried beneath 2 miles (3.7 kilometers) of ice. [More]

Satellite composite showing location of Vostok within the Antarctic continent (NASA) Two and a half miles beneath the surface of Antarctica’s central Eastern ice sheet is a body of water 160 miles by 30 miles across known as Lake Vostok , after the Vostok research station above it, built by the former Soviet Union in 1957 and now operated by Russia.

At a tiny outpost in the middle of Antarctica, Russian scientists are poised to become the first humans to reach a massive liquid lake that has been cut off from the sunlit world for millennia, and may house uniquely adapted life forms that are new to science.

At a tiny outpost in the middle of Antarctica, Russian scientists are poised to become the first humans to reach a massive liquid lake that has been cut off from the sunlit world for millennia, and may house uniquely adapted life forms that are new to science.

By Nicola Jones of Nature magazine Two scientists from New Zealand will travel to Antarctica on December 28 in a quest to continue a 100-year-long record of Earth's magnetic field: a record begun by British explorer Robert Scott at the start of his ill-fated expedition to the geographic south pole (see "Turning the world upside down "). Record-keeping is necessary because the magnetic poles move about, thanks to the complex circulation of Earth's fluid outer core.

Most travelers who view the animals in Africa and Antarctica capture the sights in photographs, but Hamish Mackie goes further.

Entire television channels broadcast the wonders of the natural world. To gain viewers and sell ads, they rely on lions hauling down zebras, aerial tracking shots of the icy grandeur of Antarctica or more prosaic film of a bear ambling through the woods.

Entire television channels broadcast the wonders of the natural world. To gain viewers and sell ads, they rely on lions hauling down zebras, aerial tracking shots of the icy grandeur of Antarctica or more prosaic film of a bear ambling through the woods

By Nina Chestney LONDON (Reuters) - An ancient lake hidden deep beneath West Antarctica's Ice Sheet may reveal vital clues about climate change and future sea level rises, and uncover new forms of life, according to a group of UK engineers and scientist. [More]

Nereus, a remotely operated vehicle, is set to travel to some of the deepest and coldest parts of the sea to find out exactly how our aquatic environments are changing--and how to fix it. Humans have stepped foot on the moon more times than we've been to the deepest floors of our oceans. As science looks to survey new species, prospect minerals, and monitor how climate change is altering the depths, engineers need to find new ways to get us there, or at least send our mechanical eyes and ears.

With thousands of Emperor penguins ( Aptenodytes forsteri ) huddled close together for warmth on the ice sheets of Antarctica , there seems bound to be some competition for a toasty spot near the middle.