Thursday, May 22, 2008

Extreme Life Found a Mile Below Seafloor

Scientists have found life about twice as far below the seafloor as has ever been documented before. A coring sample off the coast of Newfoundland turned up single-celled microbes living in searing temperatures about a mile (1,626 meters) below the seafloor.

"These are probably not only the deepest, but the hottest organisms found in deep marine sediments," said R. John Parkes, a geobiologist at Cardiff University in Wales. "I was hoping we would find them this deep, so we were very excited that we actually did confirm they were present. It's fascinating to know what proportion of our planet actually has living organisms in it."

While life has been known to exist at even greater depths beneath land — such as bacteria found nearly two miles underground in a gold mine in South Africa — life under the sea had previously only been detected to depths of about half a mile (842 meters) below the seafloor.

Parkes and his colleagues analyzed core samples returned from the Ocean Drilling Program. They found evidence for prokaryotic cells, which lack a central nucleus, that appear to be from the archaea family, a sister domain to bacteria.

The newly-discovered life likely gets its energy from methane. It thrives in 111 million–year-old rocks, enduring temperatures between 140 to 212 degrees Fahrenheit (60 to 100 degrees Celsius). In this extreme environment, life is relatively sparse.

"There's no light around, there's no oxygen around," Parkes told LiveScience. "It's basically just rocks, but there is still some space for water, which the organisms need."

This discovery of living creatures in some of Earth's most extreme hideouts may shed light on the search for extraterrestrial life.

"Until we know what's there on Earth, we're not going to have a clue what's possible on other planets," Parkes said. "I think people have taken the message from this type of work that it's no longer sufficient to take a scoop of Martian soil from the surface and say there's no life. If life on Earth can go as deep as several kilometers, there's no reason why that wouldn't be true under similar conditions on another planet."

The team detailed their findings in the May 23 issue of the journal Science.

Source: Live Science

Saturday, May 17, 2008

Bodies rot and world doesn't end, so cult exits Russia cave

A handful of Russian doomsday-cult members Friday crawled out of the damp cave where they had holed up for months awaiting the end of the world after authorities removed two rotting corpses from the underground lair. The nine were the last of the 35 men, women and children who had dug into a hillside near the town of Penza in November and threatened to blow themselves up with gas canisters if officials tried to forcibly remove them. The last quit the hide-out after officials found the bodies of two cult members who died in the cave and warned survivors they could be poisoned by fumes from the decomposing bodies.

Thursday, May 22, 2008

Extreme Life Found a Mile Below Seafloor

Scientists have found life about twice as far below the seafloor as has ever been documented before. A coring sample off the coast of Newfoundland turned up single-celled microbes living in searing temperatures about a mile (1,626 meters) below the seafloor.

"These are probably not only the deepest, but the hottest organisms found in deep marine sediments," said R. John Parkes, a geobiologist at Cardiff University in Wales. "I was hoping we would find them this deep, so we were very excited that we actually did confirm they were present. It's fascinating to know what proportion of our planet actually has living organisms in it."

While life has been known to exist at even greater depths beneath land — such as bacteria found nearly two miles underground in a gold mine in South Africa — life under the sea had previously only been detected to depths of about half a mile (842 meters) below the seafloor.

Parkes and his colleagues analyzed core samples returned from the Ocean Drilling Program. They found evidence for prokaryotic cells, which lack a central nucleus, that appear to be from the archaea family, a sister domain to bacteria.

The newly-discovered life likely gets its energy from methane. It thrives in 111 million–year-old rocks, enduring temperatures between 140 to 212 degrees Fahrenheit (60 to 100 degrees Celsius). In this extreme environment, life is relatively sparse.

"There's no light around, there's no oxygen around," Parkes told LiveScience. "It's basically just rocks, but there is still some space for water, which the organisms need."

This discovery of living creatures in some of Earth's most extreme hideouts may shed light on the search for extraterrestrial life.

"Until we know what's there on Earth, we're not going to have a clue what's possible on other planets," Parkes said. "I think people have taken the message from this type of work that it's no longer sufficient to take a scoop of Martian soil from the surface and say there's no life. If life on Earth can go as deep as several kilometers, there's no reason why that wouldn't be true under similar conditions on another planet."

The team detailed their findings in the May 23 issue of the journal Science.

Source: Live Science

Saturday, May 17, 2008

Bodies rot and world doesn't end, so cult exits Russia cave

A handful of Russian doomsday-cult members Friday crawled out of the damp cave where they had holed up for months awaiting the end of the world after authorities removed two rotting corpses from the underground lair. The nine were the last of the 35 men, women and children who had dug into a hillside near the town of Penza in November and threatened to blow themselves up with gas canisters if officials tried to forcibly remove them. The last quit the hide-out after officials found the bodies of two cult members who died in the cave and warned survivors they could be poisoned by fumes from the decomposing bodies.