In the summer of 1908, a blast over remote Siberia flattened trees across an area larger than some countries and lit the sky as far away as Europe. With no crater, no confirmed meteorite fragments and ...

Mysterious driftwood high in Grand Canyon caves hints at the legacy of Arizona’s huge impact crater.

With major eclipses, brilliant supermoons, and lineups of five or more planets, 2026 offers something awe-inspiring in every season. Here’s what to watch for. Solar prominences and their associated ...