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Ocean Changes Almost Starved Earth Life Of Oxygen ＠ 2020-03-03T20:

Chemical changes in the oceans more than 800 million years ago almost destroyed the oxygen-rich atmosphere that paved the way for complex life on Earth, ...

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3 billion-year-old Earth had water everywhere, but not one continent, study suggests ＠ 2020-03-03T08:

Chemicals in ancient ocean rocks hint that 3.2 billion years ago, the surface of a baby Earth was continent-free and covered by a global ocean.

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