Perpetual motion devices are either a gag, a scam, or as in the case of this particular toy that [Big Clive] bought on AliExpress, a rather fascinating demonstration of a contact-free inductive sensor ...
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An impossible perpetual motion device?
A look at a device claimed to achieve perpetual motion, exploring its design, mechanics, and the science behind why it’s considered impossible. Coffee linked to significant new side effect, says ...
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