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The thorny thought experiment has been turned into a real experiment — one that physicists use to probe the physics of information.
Unusual proteins that can quickly fold into different shapes provide cells with a novel regulatory mechanism.
Researchers explore a loophole that extracts useful energy from a fluid’s seemingly random motion. The secret? Sugar and asymmetry.
A recent experiment shows how quantum mechanics can make heat flow from a cold body to a hot one, an apparent (though not real) violation of the second law of thermodynamics.
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