Season 44

Video thumbnail: NOVA Day the Dinosaurs Died

NOVA

Day the Dinosaurs Died

Experts drill into the impact crater of an asteroid that created a worldwide cataclysm.

Day the Dinosaurs Died

Video thumbnail: NOVA Killer Volcanoes

NOVA

Killer Volcanoes

Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.

Killer Volcanoes

Video thumbnail: NOVA Poisoned Water

NOVA

Poisoned Water

What exactly went wrong in Flint—and what does it mean for the rest of the country?

Poisoned Water

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