Image: Oxygen atmosphere
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Oxygen_atmosphere.png (617 × 467 pixels, file size: 9 KB, MIME type: image/png)
Description: Representation of evolutionary and geological events leading to changes of oxygen content in earth's atmosphere since the formation of the planet.
Title: Oxygen atmosphere
Credit: Transferred from en.wikipedia to Commons.
Author: Tameeria at English Wikipedia
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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