Distant time and the hint of a multiverse - Sean Carroll > Ted talk

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Cosmologist Sean Carroll attacks -- in an entertaining and thought-provoking tour through the nature of time and the universe -- a deceptively simple question: Why does time exist at all? The potential answers point to a surprising view of the nature of the universe, and our place in it. (Filmed at TEDxCaltech.)<br />
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Talk by Sean Carroll.