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Why does time pass?

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April 05, 2016
in 8 - 20 MINUTES, EARTH / NATURE / UNIVERSE, LIFE STORY / PHILANTHROPY
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[10:29]

The equations of physics suggest time should be able to go backwards as well as forwards. Experience suggests, though, that it cannot. Why? And is time travel really possible?

[Video source: The Economist YouTube link]

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