When Giant Scorpions Swarmed the Seas
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Sea scorpions thrived for 200 million years, coming in a wide variety of shapes and sizes. (11m 38s)
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A look at when Temnospondyls Amphibians existed for 210 million years (9m 51s)
Life, Sex & Death Among the Dire Wolves
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Dire wolves were real! Their remains taught us a lot about how they lived. (9m 15s)
The Rise and Fall of the Bone-Crushing Dogs
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What happened to the biggest dogs that ever lived? (8m 29s)
How Horses Took Over North America (Twice)
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Horses vanished from North America for 10,000 years until a mammal brought them back. (9m 8s)
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How did Archaeopteryx relate to today’s birds? Its teeth provide a major clue. (11m 29s)
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420 million years ago, some fish wore armor – and it may have served a surprising purpose. (9m 37s)
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Insects were the first animals to fly. Scientists are still working on how it happened. (8m 38s)
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Before a group of fish could live on dry land, they acquired the ability to breathe air. (8m 40s)
Why Triassic Animals Were Just the Weirdest
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Why the Triassic was full of creatures that look a lot like other, more modern species. (9m 7s)
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Ancestors of cephalopods all had shells until it proved to be their biggest weakness. (8m 5s)
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Where did turtles come from? And how did the they get their shells? (8m 29s)
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