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Sean Carroll: Distant Time and the Hint of a Multiverse

At 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.


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Ramona Pierson: An Unexpected Place of Healing

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When Ramona Pierson was 22, she was hit by a drunk driver and spent 18 months in a coma. At TEDxDU she tells the remarkable story of her recovery -- drawing on the collective skills and wisdom of a senior citizens' home.

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Stewart Brand: The dawn of de-extinction. Are you ready?

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This video is Stewart Brand's Ted lecture on the scientific challenges and moral issues surrounding the resurrection of extinct species.

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How To Restore Your Faith In Humanity

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Cameron Russell: Looks Aren't Everything. Believe Me, I'm a Model.

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In this fearless talk, Model Cameron Russell takes a wry look at the industry that had her looking highly seductive at barely 16-years-old.

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