New research suggests the violent explosions of dying stars may have caused two of Earth’s biggest mass extinctions millions ...

Scientists don't call it the "Great Dying" for nothing. About 252 million years ago, upward of 80% of all marine species ...

Unexplained mass extinctions on EarthIn the study ... extinction.Researchers first identified the cause of the end-Cretaceous extinction by the discovery of the “iridium anomaly” — a ...

Unexplained mass extinctions on EarthIn the study ... and many other species to extinction.Researchers first identified the cause of the end-Cretaceous extinction by the discovery of the “iridium ...