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Physicist Proposes Solution to Arrow-of-Time Paradox
Entropy can decrease, according to a new proposal - but the process would destroy any evidence of its existence, and erase any memory an observer might have of it. It sounds like the plot to a weird sci-fi movie, but the idea has recently been suggested by theoretical physicist Lorenzo Maccone, currently a visiting scientist at MIT, in an attempt to solve a longstanding paradox in physics.
Loschmidt’s paradox:
1. Physics says universe is time-invariant. That is, laws still hold if time is reversed.
2. Second law of thermodynamics: entropy increases or is static but never decreases.
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