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 closer look at a device claimed to run indefinitely, exploring the science behind perpetual motion and why such systems are widely considered impossible. New poll reveals Americans see two paths on ...
Engineered grain boundaries guide sulfur ions through a layered crystal, letting light create lasting synapse-like memory in ...
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