A group of scientists has been arguing that the dinosaurs' fate was sealed long before the asteroid hit. Now, supercomputers are putting this idea to the test.

As global temperatures and greenhouse gas emissions continue to rise, scientists are studying the Permian mass extinction for clues to our fate in a world warming out of control.

Dinosaurs were wiped out by a huge asteroid, right? But what if it wasn't the final blow? Or not the only trigger for a mass extinction?