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Animal-to-Human Organ Transplants
Of the over 100,000 people on the waitlist for an organ in the United States, 17 die every day. Now, the first pig-to-human heart transplant reveals some of the challenges of xenotransplantation.
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53:47
See how Earth transformed from a barren hellscape to a planet capable of sustaining life.
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Who created the Nazca lines and why? New clues to one of the greatest ancient enigmas.
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Ancient footprints provide new evidence of humans and extinct giant beasts of the Ice Age.
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Sir David Attenborough explores a site with traces of ancient mammoths and Neanderthals.
53:30
In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate
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53:17
Intrepid paleontologists discover that dinosaurs thrived in the Arctic’s cold and dark.
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53:28
Take a tasty look at insect foods that could benefit our health and our warming planet.
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53:28
Join the hunt for the universe’s most common—yet most elusive and baffling—particle.