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TED Ed

TED Ed

TED Ed
Why don't perpetual motion machines ever work? - Netta Schramm

Why don't perpetual motion machines ever work? - Netta Schramm

05:31
How to squeeze electricity out of crystals - Ashwini Bharathula

How to squeeze electricity out of crystals - Ashwini Bharathula

04:56
What causes kidney stones? - Arash Shadman

What causes kidney stones? - Arash Shadman

05:15
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