Will Someone Build A Perpetual Motion Machine?

Getting something for nothing may violate fundamental laws of physics--but that won't keep inventors from trying

Human nature stays constant enough that it's easy to answer this one. Yes, someone will build a perpetual-motion machine in the next few years. Or, more likely, dozens of perpetual-motion machines, as starry-eyed inventors have been doing since medieval times. Not a single one will work, but they'll keep trying. Nothing is more seductive, after all, than the idea of a free lunch.

That, in essence, is all a perpetual-motion machine amounts to: a device that operates without any external power source. Or, rather, doesn't operate--for perpetual-motion devices are mechanical impossibilities--and unless someone finds a way to repeal two fundamental laws...

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