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Talk20 min

A theory of Earth's mass extinctions

Peter Ward · TED

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About

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.

The talk

  1. A theory of Earth's mass extinctions 20 min · TED's player

Credits and licence

Institution
TED
Department
TED2008
Speaker
Peter Ward
Year
2008
Level
For everyone
Language
English
Subjects
Medicine and health, Earth and environment, Astronomy and space, History
Source
TED
Licence
CC BY-NC-ND 4.0, as TED states it. Non-commercial use only, and no changed versions. TED's terms
Attribution
TED Talks are licensed by TED under Creative Commons BY-NC-ND 4.0 International and are shown here in TED's own player, as TED's usage policy asks.
Who can watch
TED gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed