New research suggests that powerful star explosions, called supernovae, may have caused at least two mass extinctions in Earth’s history. Scientists from Keele University believe that these massive blasts stripped away Earth’s ozone layer,

Exploding stars in near-solar space may have triggered at least two mass extinction events in Earth’s history. A new study led by astrophysicist Alexis Quintana from the University of Alicante suggests that supernovae—the violent deaths of massive stars—could be responsible for the Late Ordovician and Late Devonian extinction events.

At least two mass extinction events in Earth's history were likely caused by the "devastating" effects of nearby supernova explosions, a new study suggests. Researchers at Keele University say these super-powerful blasts – caused by the death of a massive star – may have previously stripped our planet's atmosphere of its ozone,

The rate of stars going supernova near Earth appears to match two mass extinctions -- 372 million years ago and 445 million years ago.