http://www.space.com/astronotes/astronotes.html

Thirsty Bugs Found in Martian-like Desert
space.com
November 24, 2004

Rain falls in Chile's Atacama Desert every ten years or so -- 
not exactly prime real estate for living things.  But a recent 
survey there has found an underground community of microbial 
life forms.

NASA scientists use the Atacama as a Mars-like environment to 
test out life-detection instruments.  There are no plants 
whatsoever in the heart of the desert, so one group of 
researchers decided to look for signs of past vegetation.

Along a 120-mile stretch of desolate land, the team collected 
several soil samples from eight to 12 inches below the surface. 
In the laboratory, sterile water was added to the soil. Ten days 
later, bacteria were discovered growing in the test tubes.

"We brought'em back alive, it turns out," said Julio Betancourt, 
a paleoecologist from the U.S. Geological Survey. 

The unusual microbes may survive Atacama's long dry spells in a 
state of suspended animation.  An earlier search for life in 
this desert came up empty, but the soil samples that were 
studied came from a shallower depth of four inches. 

The lesson for microbe-hunters, said Jay Quade from the University 
of Arizona, is:  "Don't just scratch the surface."

The results of the study are published in the Nov. 19 issue of 
Science.

 
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