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Earth Oxygen

Old Rocks Yield New Theory Of Young Earth's Atmosphere

LiveScience | Becky Oskin | Posted 03.24.2014 | Science

Today's climate change doesn't hold a candle to the chemical warfare waged on Earth more than 2 billion years ago. Before plants discovered the powe...

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 aki...