Extras
Animal parents must overcome freshwater’s constant changes.
Animal parents must balance risk and reward to raise their young in grasslands.
Appraisal: Tiffany Studios "Bookmark" Pattern Clock, ca.1915
Appraisal: Sapphire & Diamond Ring, ca. 1940
Appraisal: 1628 Mercator Hondius Map of China
Appraisal: 1978 Joichi Hoshi Autumn Light Woodblock
Appraisal: 1978 Tom Petty & the Heartbreakers-signed poster
Appraisal: Davis Pennington Brown Stoneware Face Jug, ca. 1917
Appraisal: 19th C. Jim Williams-owned Federal Hunt Board
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NOVA Season 23
New evidence sheds light on the remarkable life—and mysterious collapse—of the ancient jungle city.
What if violent asteroid impacts actually jump-started life on Earth? Explore a dramatic theory.
See how ingenuity and teamwork keep the crew alive and doing science 250 miles above Earth.
Astronauts and Mission Control relive terrifying moments during construction of the ISS.
Find out why deadly flash floods are on the rise and how we can protect ourselves from them.
Explore mysterious 9,000-year-old Stone Age megastructures found in the Arabian Desert.
Discover how two revolutionary ancient inventions changed the course of humanity forever.
Discover how Homo sapiens outlasted Neanderthals – and how they helped make us who we are today.
Follow Homo sapiens as they venture out of Africa and spread farther than any other human species.