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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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Noel Bairey Merz: The Single Biggest Health Threat Women Face

urprising, but true: More women now die of heart disease than men, yet cardiovascular research has long focused on men. Pioneering doctor C. Noel Bairey Merz shares what we know and don't know about women's heart health -- including the remarkably different symptoms women present during a heart attack (and why they're often missed).

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Optical Illusion: Perspective is Everything

Definition of "illusion": something that deceives by producing a false or misleading impression of reality.

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Janet Echelman: Taking Imagination Seriously

Janet Echelman found her true voice as an artist when her paints went missing -- which forced her to look to an unorthodox new art material. Now she makes billowing, flowing, building-sized sculpture with a surprisingly geeky edge. A transporting 10 minutes of pure creativity.

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Faith Jegede: What I've Learned From My Autistic Brothers

In this video, Faith Jegede tells the moving and funny story of growing up with her two brothers, both autistic.

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Ramona Pierson: An Unexpected Place of Healing

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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