Andrew McAfee speaking at TEDxBoston. Sheryl Lanzel/TED hide caption

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Are Droids Taking Our Jobs?

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Cynthia Breazeal speaks during TEDWomen. James Duncan Davidson/TED hide caption

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Will Man's Best Friend Be A Robot?

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Sherry Turkle is concerned about how our devices are changing us, as human beings. James Duncan Davidson/TED hide caption

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Are We Plugged-In, Connected, But Alone?

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"All these possibilities are out there. And we live in the one that is hospital to our form of life." — Brian Greene James Duncan Davidson/TED hide caption

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Is Our Universe The Only Universe?

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"We should search because it tells us how to collaborate our place in the cosmos." — Jill Tarter TED / James Duncan Davidson hide caption

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Are We Alone In The Universe?

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Phil Plait knows the secrets to avoiding a big asteroid catastrophe. Courtesy of TED hide caption

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How Can We Defend Earth From Asteroids?

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Nobel Prize winner Saul Perlmutter explains part of his research in astrophysics. Kimberly White/Getty Images hide caption

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How Did A Mistake Unlock One Of Space's Mysteries?

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