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How a Teenager's Opioid Prescription Led to Dependence
In her teens, Casey stayed busy with sports. But severe muscle cramps landed her in the hospital, where she was prescribed opioids for her pain. An emergency room doctor realized she was addicted and said not to come back—leaving her and her family to deal with the problem on their own.
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Explore mammals’ surprising origins, long before the age of dinosaurs.
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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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53:32
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.