Backed by a National Science Foundation grant of more than $500,000, Pfeifer, the lead principal investigator, and a team of ...

For hundreds and thousands of years, Earth has endured cataclysmic events that have molded life on our planet. While the asteroid impact that wiped out the dinosaurs 66 million years ago is well-known ...

Introduction -- Beginnings -- The end-Ordovician mass extinction -- The late Devonian mass extinction -- The end-Permian mass extinction -- The end-Triassic mass extinction -- The end-Cretaceous mass ...

Mass extinction : a general view / Ashraf M.T. Elewa -- Late Ordovician mass extinction / Ashraf M.T. Elewa -- The end Ordovician : an ice age in the middle of a greenhouse / Curtis R. Congreve -- ...

Last week, a group of Stanford researchers published a paper with a very simple, very terrifying message. The number of species that have gone extinct over the past few centuries is high—as in, up to ...