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Gamma ray bursts may have triggered Ordovician extinction
Melott and colleagues proposed gamma ray bursts from supernovae as a one two punch killing two thirds of species in the Ordovician and sparking a half million year ice age through ozone depletion and brown smog. They note deep water life survived while shallow water and land life suffered.
MENTIONED IN THIS ARTICLE
Melott
Earth
Bruce S. Lieberman
University of Kansas
Jere H. Lipps
Gist
University of California, Berkeley
Lipps