The ‘Great Dying’ wiped out 90% of life, then came 5 million years of lethal heat. New fossils explain why

A mass extinction event wiped out around 90% of life. What followed has long puzzled scientists: The planet became lethally hot for 5 million years. Researchers say they have figured out why using a vast trove of fossils.

​ A mass extinction event wiped out around 90% of life. What followed has long puzzled scientists: The planet became lethally hot for 5 million years. Researchers say they have figured out why using a vast trove of fossils. Read More Breaking News, Latest News and Videos | CNN