About 250 million years ago, at the end of the Permian period, something killed some 90 percent of the planet's species. Less than 5 percent of the animal species in the seas survived. On land ...

Nobu Tamura/Wikimedia Commons The Triassic Period (252-201 million years ago) began after Earth's worst-ever extinction event devastated life. The Permian-Triassic extinction event, also known as the ...

Tropical riparian ecosystems—those found along rivers and wetlands—recovered much faster than expected following the ...

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 ...

Life in the Triassic period had a rough start. In the Permian period before, the largest mass extinction event in Earth’s history had just taken place. Despite the widespread devastation ...

Roughly the same as the total GHG emission from all sources for the state of Hawaii during the same period ... in the Permian — an area roughly the size of Great Britain that is responsible ...