Science News for Kids: Snapshot: Killer Space Rock ...
Rock fragments from Antarctica suggest a huge meteor struck Earth 250 million years ago. Long before dinosaurs ever lived, Earth suffered a major catastrophe that wiped out most life on the planet. About 250 million years ago, 95 percent of ... [... more] Science News for Kids
Volcanoes Snuffed Out Most Life 250 Million Years Ago
New evidence that the Great Dying was not caused by a space rock. Scientists have gone back-and-forth in recent years on what caused the various mass extinctions clearly evident in the fossil record. The worst of these, known as the Great Dying, ... [... more] Live Science
