Supernovas may have played a role in two of Earth’s largest mass extinctions, study suggests
New research suggests the violent explosions of dying stars may have caused two of Earth’s biggest mass extinctions millions ...
Mashable11d
Distant star explosions could have wiped out life on Earth twice
A supernova is a cataclysmic stellar death that ... the Yucatán Peninsula — and killed off many of the dinosaurs about 66 million years ago. But that was not the only mass extinction for ...