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Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cougars' diverse diet survive Pleistocene mass extinction
2014/5/13
Cougars may have survived the mass extinction that took place about 12,000 years ago because they were not particular about what they ate, unlike their more finicky cousins–the saber-tooth cat and Ame...
Dramatic shift from simple to complex marine ecosystems occurred 250M years ago at mass extinction（图）
marine species ecology
2006/12/8
November 25, 2006，CHICAGO--The earth experienced its biggest mass extinction about 250 million years ago, an event that wiped out an estimated 95% of marine species and 70% of land species. New resear...