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The Elegant Universe: Part 1 Preview
"Einstein's Dream," introduces string theory and shows how modern physics—composed of two theories that are ferociously incompatible—reached its schizophrenic impasse: One theory, general relativity, successfully describes big things like stars and galaxies, while another, quantum mechanics, is equally successful at explaining small things like atoms and subatomic particles.
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Explore mammals’ surprising origins, long before the age of dinosaurs.
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Do speech buttons really allow dogs to talk to us? Scientists investigate.
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New evidence sheds light on the remarkable life—and mysterious collapse—of the ancient jungle city.
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What if violent asteroid impacts actually jump-started life on Earth? Explore a dramatic theory.
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See how ingenuity and teamwork keep the crew alive and doing science 250 miles above Earth.
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Astronauts and Mission Control relive terrifying moments during construction of the ISS.
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Find out why deadly flash floods are on the rise and how we can protect ourselves from them.
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Explore mysterious 9,000-year-old Stone Age megastructures found in the Arabian Desert.
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Discover how two revolutionary ancient inventions changed the course of humanity forever.
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Follow ancient humans’ journey into an icy and perilous new land.
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Discover how Homo sapiens outlasted Neanderthals – and how they helped make us who we are today.
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53:25
Follow Homo sapiens as they venture out of Africa and spread farther than any other human species.