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It's Okay to Be Smart
%$?# Allergies!
Season 3
Episode 23
Springtime means the arrival of green grass, bright flowers, and buzzing bees. But for many of us, it’s also about sneezing, watery red eyes, and a runny nose, thanks to allergies. In this week’s video, you’ll learn why we get allergies, how our immune system turns against us to attack pollen and pets, and why allergies seem to be on the rise in developed nations.
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21:13
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16:20
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16:18
How did dinosaurs become birds—and what good is half a wing?

16:00
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26:19
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16:53
The key enzyme behind photosynthesis isn’t actually all that great at its job.

16:40
The oldest rocks on Earth are more than just ancient—they’re time machines!

17:11
This is one of the weirdest mysteries of human evolution: Why do we have grandmas?

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14:35
How a chemical in lizard spit inspired one of the most important medical advancements.

12:15
These diamond makers create one of the most amazing materials on Earth — from dead people.