TED Talks

Peter Ward: Earth’s mass extinctions (2009x16)

Ημερομηνία προβολής: Ιαν 28, 2009

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.