News tagged with permian period

Counting calories in the fossil record

Starting about 250 million years ago, at the end of the Permian period, brachiopod groups disappeared in large numbers, along with 90 percent of the planet's species. Today, only a few groups, or genera, ...

Mar 26, 2014
4.5 / 5 (2) 0

When tectonics killed everything

A new paper reveals how the worst extinction in Earth's history may have been tied to the formation of Supercontinent Pangea. The catastrophe wasn't triggered by an impact from above—unlike another well-known ...

Nov 25, 2013
3.9 / 5 (29) 8 | with audio podcast

Evolutionary origin of the turtle shell

Through careful study of an ancient ancestor of modern turtles, researchers now have a clearer picture of how the turtles' most unusual shell came to be. The findings, reported on May 30 in Current Biology, help t ...

May 30, 2013
4.4 / 5 (11) 0 | with audio podcast