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It's Okay to Be Smart
Blood Types Are Weirder Than You Think
Season 13
Episode 8
Across life on Earth, blood comes in blue, green, purple, even clear. But why? And what makes your blood different from mine? This is the strange world of blood—what it does, why it varies, and why we can’t live without it.
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This video is all about the difference between mass and weight.
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Humans have a hard time with really big numbers, especially when it comes to DEEP TIME.
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What do other life forms have to teach us about staying alive as we get old?
10:16
Eating turkey this holiday season? You’re eating a dinosaur!