The Epic Journey and Extinction of an Ancient Saber-Toothed Predator.

Fossils of an apex predator called Inostrancevia, a tiger-sized, saber-toothed mammal forerunner, were discovered in South Africa, revealing that it migrated over time, about 7,000 miles across Earth's ancient supercontinent Pangaea, in a desperate, and ultimately failed, bid to survive the mass extinction called "the Great Dying" that occurred roughly 252 million years ago at the end of the Permian Period. The mass extinction was triggered by runaway global warming caused by calamitous volcanism in Siberia, dooming perhaps 90% of species. The researchers see parallels between the Permian crisis and today's human-induced climate change.