All over the world, scientists are discovering traces of ancient floods on a scale that dwarfs even the most severe flood disasters of recent times. What triggered these cataclysmic floods, and could they strike again? In the Channeled Scablands of Washington State, the level prairie gives way to bizarre, gargantuan rock formations.
Watch as birds solve puzzles and challenge our basic notions of intelligence.
Experts reconstruct the Great Hurricane of 1780 to help predict the risk of future storms.
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.
