According to new research from Keele University and the Universidad de Alicante, near-Earth explosions of giant O- and B-type stars occur at a rate of...
The end-Ordovician mass extinction, the first of the ‘Big Five’ mass extinctions occurred 445 million years ago and was characterized by the disappearance...
Geologists from Tohoku University, Japan, Amherst College and Washington University in Saint Louis, the United States, say they may have found the cause...
