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jan 1, 279 BC - Atmospheric Oxygen

Description:

Cyanobacteria or blue-green algae became the first producer of oxygen on earth and started producing oxygen approximately ~2300 mya (million years ago)

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Timeline of Life on Earth

ByAnas Banigesh
8 Jan 2020
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436

Date:

jan 1, 279 BC
Now
~ 2306 years ago

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