Has Nasa found little green men?

"In a press conference scheduled for tomorrow evening, researchers will unveil the discovery of a microbe that can live in an environment previously thought too poisonous for any life-form to survive.The bacteria has been found at the bottom of Mono Lake in California's Yosemite National Park which is rich in arsenic – usually poisonous to life.
Somehow the creature uses the arsenic as a way of surviving and this ability raises the prospect that similar life could exist on other planets, which do not have our benevolent atmosphere.
Dr Lewis Dartnell, an astrobiologist at the Centre for Planetary Sciences in London, said: "If these organisms use arsenic in their metabolism, it demonstrates that there are other forms of life to those we knew of.
"They're aliens, but aliens that share the same home as us."
The space agency will announce the full extent of the findings at a press conference titled “astrobiology finding which will impact the search for evidence of extraterrestrial life”. By Richard Alleyne
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