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Great Oxidation Event

What Ancient Rocks Reveal About Life On Earth, Other Planets

LiveScience | Charles Q. Choi | Posted 09.26.2013 | Science

Oxygen may have filled Earth's atmosphere hundreds of millions of years earlier than previously thought, suggesting that sunlight-dependent life akin ...

Multicellular Fossils Found In Africa May Be World's Oldest

Posted 05.25.2011 | World

An international team of scientists said they've discovered fossils that may represent traces of the earliest-known multicellular life on the planet, ...