Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing ...

On land, large herbivores like Moschops also disappeared. This extinction cleared the way for dinosaurs but wiped out most large amphibians and early archosaurs—creatures that would’ve ...

This realization led Wright and his co-authors to connect the cosmic phenomenon with mass extinctions on Earth. Cataclysmic events have taken place five times in the past 500 million years ...

(Picture: NASA Goddard / SWNS) Exploding stars known as supernovas may have sparked mass extinctions that wiped ... Massive, dying stars – five to 10 times the size of our Sun – start to ...

the experts found that their research supported the theory that a supernova explosion was responsible for both the late Devonian and Ordovician extinction events -- two of the five known mass ...

This realization led Wright and his coauthors to connect the cosmic phenomenon with mass extinctions on Earth. Cataclysmic events have taken place five times in the past 500 million years ...