Peter Ward: A theory of Earth's mass extinctions
TED.com
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Asteroid strikes get all the coverage, but Medea Hypothesis author Peter Ward argues that most of Earth's mass extinctions were caused by lowly bacteria. The culprit, a poison called hydrogen sulfide, may have an interesting application in medicine.
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- Internet Archive, in TED Talks
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- CC BY-NC-ND 3.0, as the Internet Archive states it.
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- TED.com
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- English
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