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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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She's Alive... Beautiful... Finite... Hurting... Worth Dying for.

She's Alive... Beautiful... Finite... Hurting... Worth Dying for.

This is a non-commercial attempt to highlight the fact that world leaders, irresponsible corporates and mindless 'consumers' are combining to destroy life on earth. It is dedicated to all who died fighting for the planet and those whose lives are on the line today.

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Tony Robbins: Why We Do What We Do, and How We Can Do It Better

Tony Robbins: Why We Do What We Do, and How We Can Do It Better

Tony Robbins discusses the "invisible forces" that make us do what we do -- and high-fives Al Gore in the front row.

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Space Painter

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Creation of a distant world.

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AJ Jacobs: How Healthy Living Nearly Killed Me

AJ Jacobs: How Healthy Living Nearly Killed Me

For a full year, AJ Jacobs followed every piece of health advice he could -- from applying sunscreen by the shotglass to wearing a bicycle helmet while shopping. Onstage at TEDMED, he shares the surprising things he learned.

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How To Restore Your Faith In Humanity

How To Restore Your Faith In Humanity

Lost faith in humanity? These 10 moments may help you restore your faith in our species.

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