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When Earth Was Bombarded by Asteroids

Season 53 Episode 1 | 3m 41s

Four and a half billion years ago, Earth was battered by relentless asteroid impacts powerful enough to vaporize oceans and melt its crust. Despite the chaos, life emerged anyway.

National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust and PBS viewers.
Extras
The story of the dolphin reveals how intelligence evolved, step by step, over billions of years.
Step into the stunning cave that’s reshaping our understanding of prehistoric art.
Witness how Native North Americans have generated scientific knowledge over thousands of years.
Follow the relentless quest that led to a breakthrough treatment for a deadly disease.
Inside the race to bring life-saving genetic therapies to every person living with cystic fibrosis.
Inside one mother's fight to ensure a healthy life for her child with cystic fibrosis.
Glaciologist Brent Minchew on the “Doomsday Glacier," a bold fix, and his path from the Marines.
Jordan Ellenberg discusses the math behind AI, strange geometry, and living with uncertainty.
Homo sapiens weren't alone. Discover the lost human species that once shared our world.
MIT's Daniela Rus discusses AI without data centers and its potential in robotics.