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The Sudden burst of diversity that marked the dawn of truly complex life on our planet.
10:28
The Paleozoic Era is one of the most chaotic times in Earth's history. Find out why!
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So if we want to know how we got here, we have to understand how "here" got here.
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In the late 1800s, paleontologists in Nebraska found huge coils of hardened sand.
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5 million years ago, a predator made its way onto the coastal plains of North America.
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More than two billion years ago, a tiny living thing started to live inside another thing.
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An unlikely group of pioneers ultimately made life on land possible -- the fungi.
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Imagine an enormous, lush rainforest teeming with life...in the Arctic.
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Dinosaurs have been found with some sort of fluff or even full-on plumage.
