Promising-looking SETI sign seems to be of human origin

Enlarge / Proxima Centauri, the closest star to Earth other than the Solar. (credit score: ESA, Hubble, and NASA) Trendy human society has been making it ever more difficult for… Read more

Researchers suggest a supernova triggered the Late Devonian mass extinction

Enlarge / The Cassiopeia A supernova which left this remnant behind occurred about 11,000 mild years away—a lot too far to pose a major menace—and its wavefront doubtless reached Earth… Read more