Evidence of earliest life on Earth disputed

When Australian scientists presented evidence in 2016 of life on Earth 3.7 billon years ago—pushing the record back 220 million years—it was a big deal, influencing even the search for life on Mars.

Bacteria could aid search for creatures on other planets

Could there be a way to find bacterial structures on another planet? And if so, how important might these bacteria be in making a planet life-friendly? These are some of the questions that could be answered through studies ...

Microbial mats offer clues to life on early Earth

Ancient clusters of rock that preserve some of the oldest microbes on Earth occasionally possess mysterious branch-like formations. Now, scientists think they know what might have caused this enigmatic branching—changes ...

A 3.45-billion-year-old diet

Researchers are providing new information about the 'diet' of microorganisms on the early Earth. By studying 3.45-billion-year-old rocks, the team uncovered clues about ancient microbial metabolism.

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