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It's Okay to Be Smart

The Mystery of Earth's Disappearing Giants

We investigate a mystery. Millennia ago, while much of the Earth was covered in ice, enormous animals lived on every continent except Antarctica. Species like ground sloths, mammoths, gomphotheres, sabertooth cats, even wombats the size of cars! Today, Africa is the only continent where these megafaunas still exist. Why? What happened to the rest of Earth’s giants?

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Season
The Unbelievable Story of Earth’s Most Epic Flood
12:44
Let's learn the story of one of the worst natural disasters that’s ever happened!
The Biggest Myth About Climate Change
27:56
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11:50
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10:41
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How Illusions Can Explain Reality
19:07
Illusions teach us how our brain constructs a three-dimensional reality using 2-D images.
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22:18
Joe talks biology with science communicator extraordinaire Prof. Brian Cox.
Why Don't Big Animals Get More Cancer?
9:42
We explore why animals like whales, elephants, and other large animals not get cancer.
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