Creatures adapt to changing environments ... the fact that at the end of the Permian Period they were gone seems unthinkable. But it was before the Permian Period that damage had already been ...

Phar Lap and Secretariat have been called the greatest two racehorses in the world. The Permian races ahead of pandemic lows. One year ago, the Permian basin in West Texas and New Mexico had just ...

These toughened-up creatures represented a crucial innovation ... the world's oceans until they were wiped out in the Permian extinctions about 250 million years ago. Photograph by James L.