An illustration of the Devonian period fish, Dunkleosteus, preying on eurypterids (sea scorpions), which in turn were feeding on the smaller trilobites. Depleting oxygen and rising hydrogen sulfide ...

Boulder, Colo., USA: The Devonian Period, 419 to 358 million years ago, was one of the most turbulent times in Earth’s past and was marked by at least six significant marine extinctions, including one ...

Diverse and full of sea life, the Earth's Devonian era—taking place more than 370 million years ago—saw the emergence of the first seed-bearing plants, which spread as large forests across the ...

If we did see a "local" supernova, we'd have plenty of time to develop the technology to protect the earth from its worst effects. Click to expand... We'd certainly have a lot of time, but I'm not ...

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 ...

Simultaneous explosions of stars, called supernovae, may have led to one of Earth's mass extinctions 359 million years ago, according to new research. Simultaneous explosions of stars, called ...

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 ...