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James Hansen: Why I Must Speak Out About Climate Change

Top climate scientist James Hansen tells the story of his involvement in the science of and debate over global climate change. In doing so he outlines the overwhelming evidence that change is happening and why that makes him deeply worried about the future.


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Space Painter

Creation of a distant world.

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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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Elizabeth Gilbert: Your Elusive Creative Genius

"Eat, Pray, Love" author Elizabeth Gilbert muses on the impossible things we expect from artists and geniuses -- and shares the radical idea that, instead of the rare person "being" a genius, all of us "have" a genius.

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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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Life = Risk

This motivational video discusses the failures that famous people like Michael Jordan and Thomas Edison had to overcome before realizing amazing success.

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