Oldest ‘microfossils’ raise hopes for life on Mars
• Washington PostThe hunt for the most ancient example of life on Earth has a pungent new contender: Sulfur-belching microbes fossilized in 3.4-billion-year-old western Australian sandstone. The find bodes well for the search for life on Mars, researchers say.
http://www.nytimes.com/2011/08/22/science/earth/22fossil.html