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Antarctic Lake Vida Provides Clue To Alien Life

November 28, 2012 Leave a comment

By Posted: 27/11/2012

The discovery of bacteria which thrives in a salty, ice-sealed Antarctic lake has strengthened the possibility of alien life on planets such as Mars.

Lake Vida, which is located in the region’s McMurdo Dry Valleys, contains no oxygen, is mostly frozen and possesses the highest nitrous oxide levels of any natural water body on Earth.

A briny liquid that is approximately six times saltier than seawater percolates throughout the icy environment that has an average temperature of minus 13.5 degrees centigrade (8 degrees Fahrenheit).

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The discovery of bacteria in an Antarctic lake strengthens the possibility of alien life on other planets (file picture)

 Dr Peter Doran, of the University of Illinois in Chicago, told New Scientist: “Lake Vida is a model of what happens when you try to freeze a lake solid, and this is the same fate that any lakes on Mars would have gone through as the planet turned colder from a watery past.

“Any Martian water bodies that did form would have gone through this Vida stage before freezing solid, entombing the evidence of the past ecosystem.”

The findings are published in the Proceedings of the National Academy of Sciences journal (PNAS), and were co-authored by Dr Alison Murray and Dr Christian Fritsen, of Nevada’s Desert Research Institute (DRI).

Read more: http://www.huffingtonpost.co.uk/2012/11/27/antarctic-lake-vida-alien-_n_2198485.html?utm_hp_ref=uk

Satellite Study of Asian Mountains Show That Glaciers Are Gaining New Ice, Not Melting


Wednesday, 11 July 2012

‘Huge glaciers in the area between Pakistan and China are puzzling scientists – and disproving the doom-laden predictions of some climate experts. The glaciers in the Karakoram Range between northern Pakistan and western China have actually grown, rather than shrinking.

Unlike most mountain glaciers, the Karakoram glaciers, which account for 3 percent of the total ice-covered area in the world, excluding Greenland and Antarctica, are not shrinking.’

Read more: Satellite Study of Asian Mountains Show That Glaciers Are Gaining New Ice, Not Melting

http://www.davidicke.com/headlines

 

Researchers Estimate Ice Content of Crater at Moon’s South Pole


ScienceDaily (June 20, 2012) — NASA’s Lunar Reconnaissance Orbiter (LRO) spacecraft has returned data that indicate ice may make up as much as 22 percent of the surface material in a crater located on the moon’s south pole.

Elevation (left) and shaded relief (right) image of Shackleton, a 21-km-diameter (12.5-mile-diameter) permanently shadowed crater adjacent to the lunar south pole. The structure of the crater’s interior was revealed by a digital elevation model constructed from over 5 million elevation measurements from the Lunar Orbiter Laser Altimeter. (Credit: NASA/Zuber, M.T. et al., Nature, 2012)
 

The team of NASA and university scientists using laser light from LRO’s laser altimeter examined the floor of Shackleton crater. They found the crater’s floor is brighter than those of other nearby craters, which is consistent with the presence of small amounts of ice. This information will help researchers understand crater formation and study other uncharted areas of the moon. The findings are published in Thursday’s edition of the journal Nature.

“The brightness measurements have been puzzling us since two summers ago,” said Gregory Neumann of NASA’s Goddard Space Flight Center in Greenbelt, Md., a co-author on the paper. “While the distribution of brightness was not exactly what we had expected, practically every measurement related to ice and other volatile compounds on the moon is surprising, given the cosmically cold temperatures inside its polar craters.”

Read more : http://www.sciencedaily.com/releases/2012/06/120620141159.htm