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AOL.com Video - What Is Time? Theoretical Physicist Sean Carroll Explains Time's Arrow

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VIDEO:Knowledge

What Is Time? Theoretical Physicist Sean Carroll Explains Time's Arrow

Description:HuffPost Senior Science Correspondent Cara Santa Maria learns about the arrow of time from Caltech theoretical physicist Sean Carroll. (5:06)

Source: Talk Nerdy to Me

Tags: arrow of time , cara santa maria , clocks , eternity

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