More than 17,000 species are known to have survived until the mega-extinction that ended the Permian period 251 million years ago. A predator of the Cambrian was the giant, shrimplike Anomalocaris ...

or "life oasis," for terrestrial plants during the end-Permian mass extinction, the most severe biological crisis since the ...

A region in China’s Turpan-Hami Basin served as a refugium - or “life oasis”- for terrestrial plants during the end-Permian mass extinction.

Others propose that an extinction of life just before the Cambrian opened up ecological roles, or "adaptive space," that the new forms exploited. External, ecological factors like these were ...

Others propose that an extinction of life just before the Cambrian opened up ecological roles, or "adaptive space," that the new forms exploited. External, ecological factors like these were ...