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The Time that Oxygen almost killed everything
The Time that Oxygen almost killed everything
https://www.pbs.org/video/that-time-oxygen-almost-killed-everything-cnzweg/
1. What was the earth’s oceans like in the Archean? What color were the oceans?
2. What appeared about 2.8 b.y. ago? What did they do to the biosphere? What did it do to
the oceans?
3. What did the rising oxygen do to the anaerobic microbes?
4. What did the photosynthetic bacteria do to the earth’s atmosphere and its climate? What
gases did they remove? What gas did they produce?
5. What did the oxygen layer do to protect us from UV from space?
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