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Sean Carroll: The Passage of Time and the Meaning of Life

Long Now

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Entropy and the Second Law of Thermodynamics

Why is it that we can know more about the past, but we can influence the future in some way? The answer isso hicalled entropy and the second law of thermo dynamics. In a closed, isolated system, or in the universe as a whole, entropy increases over time. So unlike newton's laws or other attempts at fundamental laws of physics, the second law does tell the difference between the past, present and future.

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