Up Next
Back to Show
NOVA
When Earth Was Bombarded by Asteroids
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.
Support Provided By
53:40
Archaeologists investigate the dramatic origins of democracy in ancient Greece 2,500 years ago.
53:08
Follow the Artemis mission to bring humanity back to the Moon for the first time since Apollo.
53:25
Surprising evidence at the world’s oldest temple overturns our understanding of human history.
Unlock with PBS Passport
53:39
New evidence sheds light on the remarkable life—and mysterious collapse—of the ancient jungle city.
Unlock with PBS Passport
53:31
What if violent asteroid impacts actually jump-started life on Earth? Explore a dramatic theory.
Unlock with PBS Passport
53:41
See how ingenuity and teamwork keep the crew alive and doing science 250 miles above Earth.
Unlock with PBS Passport
53:40
Astronauts and Mission Control relive terrifying moments during construction of the ISS.
53:28
Find out why deadly flash floods are on the rise and how we can protect ourselves from them.
53:21
Explore mysterious 9,000-year-old Stone Age megastructures found in the Arabian Desert.