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The most popular TED-Ed Lessons of 2021

A self-healing, cannibalistic salamander. A pair of star-crossed lovers. An epic journey to the end of the world. (And more.) Behold the 10 most popular TED-Ed lessons of 2021.

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Thomas L. Dawson

What causes dandruff, and how do you get rid of it?

4 minutes 51 seconds

Nina G. Jablonski

Why do we have hair in such random places?

4 minutes 3 seconds

Iseult Gillespie

Savitri and Satyavan: The legend of the princess who outwitted Death

5 minutes 21 seconds

Sara C. Mednick

How long should your naps be?

4 minutes 43 seconds

Luis Zambrano

Axolotls: The salamanders that snack on each other (but don't die)

5 minutes 2 seconds

Marianne Schwarz

What happens to your brain during a migraine?

4 minutes 32 seconds

Dan Kwartler

Why don't we cover the desert with solar panels?

5 minutes 6 seconds

Soraya Field Fiorio

The epic of Gilgamesh, the king who tried to conquer death

5 minutes 7 seconds

Iseult Gillespie

The Norse myth that inspired "The Lord of the Rings"

5 minutes 8 seconds

Kayla Mandel Sheets

You could have a secret twin (but not the way you think)

4 minutes 4 seconds