Watch as birds solve puzzles and challenge our basic notions of intelligence.
Day the Dinosaurs Died
Experts drill into the impact crater of an asteroid that created a worldwide cataclysm.
Black Hole Apocalypse
Take a mind-blowing voyage to the most powerful and mysterious objects in the universe.
Extreme Animal Weapons
NOVA uncovers the secrets of nature’s battleground—claws, horns, fangs and all.
Scientists uncover geologic evidence of epic floods that tore through ancient landscapes.
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.