The late Devonian extinction is one of the five major extinction events to have occurred on Earth. It's not unusual for scientists to argue over what causes a mass extinction event -- of the five, the ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Sharks might be the all time bullet-dodging champions. They’ve been around for about 450 million years, longer than trees, longer ...

Exploding stars in near-solar space may have triggered at least two mass extinction events in Earth's history. An analysis of the frequency of supernova explosions in the Milky Way, led by ...