Ideas worth spreading

Distant time and the hint of a multiverse

1,850,833 views | Sean Carroll • TEDxCaltech

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.

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.

This talk was presented to a local audience at TEDxCaltech, an independent event. TED's editors chose to feature it for you.

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About the speaker

Physicist, cosmologist

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A physicist, cosmologist and gifted science communicator, Sean Carroll is asking himself -- and asking us to consider -- questions that get at the fundamental nature of the universe.

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This talk was presented to a local audience at TEDxCaltech, an independent event. TED's editors chose to feature it for you.

Read more about TEDx.