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Through his hot air balloon experiments, physicist, Victor Hess discovers the phenomenon and effects of cosmic radiation.
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Explore the Earth under your feet.
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The Pacific Rim is home to half of the world's active volcanoes, and ninety percent of the world's earthquakes, yet nearly 800 million people continue to live within its violent edge.
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Reporter-at-large Dr. Kiki interviews the movers and shakers in science.
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The African Rift is a massive gash that runs through eastern Africa and was likely the birthplace of life on earth. Find out how the geology of these places shaped our past and how their location on a tectonic boundary threatens the future.
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The Discovery of PenicillinPenicillin was one of medical sciences biggest breakthroughs.100 Greatest Discoveries (02:14)
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Cosmic RadiationThrough his hot air balloon experiments, physicist, Victor Hess discovers the phenomenon and effects of cosmic radiation.100 Greatest Discoveries (01:23)
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The Beginning of AnesthesiaAnesthesia allowed surgeries to be completely painless for the patient.100 Greatest Discoveries (02:38)
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The Core of the EarthTake an in depth look at our planet with host Bill Nye, as he examines the Earth's inner and outer core.
100 Greatest Discoveries (02:39)
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Plate TectonicsBill Nye and geologist, Dr. Neal Driscoll visit the California coastline where the Pacific and North American plates collide to help explain the phenomenon and effects of plate tectonics100 Greatest Discoveries (02:05)
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Global Warming, Shrinking...Watch one of the most visible effects of global warming and how the emission of fossil fuels may contribute to current warming trends.100 Greatest Discoveries (01:57)
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Continental DriftGroundbreaking research by Alfred Wegener reveals that the phenomenon of continental drift.100 Greatest Discoveries (02:12)
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OpabiniaOpabinia, one of the underwater creatures discovered in the Burgess Shale, having five eyes and a trunk like appendage was unlike any animal today100 Greatest Discoveries (00:40)
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Germ Theory OriginsPasteur discovered how to "pasteurize" to keep things germ free.100 Greatest Discoveries (01:30)
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KT Boundary DiscoveryCreated by a miles long Meteor, the KT Boundary marks the end of the Dinosaurs100 Greatest Discoveries (02:44)
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David Keeling - Global WarmingDavid Keeling's research help illuminate the link between global warming and carbon dioxide emissions.100 Greatest Discoveries (01:52)
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William Harvey: Blood Flow...William Harvey discovers how blood is actually circulated100 Greatest Discoveries (02:43)
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