Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing over a period of roughly 30 million years, but that would come to a halt ...

Violent supernovas may have caused two of Earth’s largest mass extinctions that have never been completely explained, according to a theory put forward in new research.During the final stages of a ...

Will modern coral reefs go extinct? The answer is uncertain, but some of their ancient counterparts managed to dodge a bullet — for a while, at least. Scientists from Osaka Metropolitan University ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Violent supernovas ...