A new study shows that iron-bearing rocks that formed at the ocean floor 3.2 billion years ago carry unmistakable evidence of oxygen.
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Plant Biology: October 2015
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- 15 Jul: Ninth International Conference on Mars
- 15 Jul: Astro2020 Decadal Survey Committee Meeting
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- 17 Jul: Space Scientists Mark Apollo 11 Anniversary at National Archives
- 17 Jul: Hearing: Moon to Mars: NASA's Plans for Deep Space Exploration
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- 22 Jul: Ninth International Conference on Mars
- 22 Jul: Ninth International Conference on Mars
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