Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/why-don-t-perpetual-motion-machines-ever-work-netta-schramm Perpetual motion machines — devices that can do work indefinitely without any external energy source — have captured many inventors’ imaginations because they could totally transform our relationship with energy. There’s just one proble
![Why don't perpetual motion machines ever work? - Netta Schramm](https://cdn-ak-scissors.b.st-hatena.com/image/square/73a7422c37529d90a45d76793c77682059150424/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2FA-QgGXbDyR0%2Fhqdefault.jpg)