TED-Ed channel

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Can you solve the giant spider riddle? - Dan Finkel
Iceland's secret power - Jean-Baptiste P. Koehl
Could we build a wooden skyscraper? - Stefan Al
A brief history of toilets - Francis de los Reyes
How do you know what's true? - Sheila Marie Orfano
The woman who stared at the sun - Alex Gendler
How long should your naps be? - Sara C. Mednick