http://www.space.com/scienceastronomy/lava_life_040422.html [Broken]Using a method never applied to rock from ancient Earth, researchers have found possible signs of biological activity dating back nearly 3.5 billion years, earlier than any other agreed-upon discovery of life on this planet.
The primordial life appears to have eaten rocks to survive.
Meanwhile, separate work is turning up intriguing similar structures in Mars rocks found on Earth, though no claims of life have yet been made with regard to this ongoing Martian investigation.
If the terrestrial finding is confirmed, it means life was thriving not long after this world had been presumably sterilized several times over by asteroid and comet impacts that were common in the earliest era of the solar system, which is about 4.6 billion years old. [continued]
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