A new view of mass extinctions... (Endings)

by David Turell , Thursday, July 02, 2009, 16:28 (5621 days ago) @ David Turell

How many mass extinctions are on record?
 
> Six - 
Didn't mean to be so brief but John Clinch added some info regarding six and I thought this site might want to hear from Niles Eldridge: - http://www.actionbioscience.org/newfrontiers/eldredge2.html