Blaise Aguera y Arcas leads a dazzling demo of Photosynth, software that could transform the way we look at digital images. Using still photos culled from the Web, Photosynth builds breathtaking dreamscapes and lets us navigate them.

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With stunning photos and stories, National Geographic Explorer Wade Davis celebrates the extraordinary diversity of the world’s indigenous cultures, which are disappearing from the planet at an alarming rate.

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We know the negative images of Africa — famine and disease, conflict and corruption. But, says Ngozi Okonjo-Iweala, there’s another, less-told story happening in many African nations: one of reform, economic growth and business opportunity.

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This 4-minute trailer gives you a taste of TED and the magic that happens at each TED Conference. Amazing speakers, powerful connections and unforgettable moments happen at this four-day “brain spa” — and they echo throughout the web, as we release videos from the conference on TED.com.

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Sir Ken Robinson makes an entertaining and profoundly moving case for creating an education system that nurtures (rather than undermines) creativity.

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