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Science & Medicine

Where are all the aliens? Stephen Webb

TEDTalks 科学と医療 by TED

Jul 19, 201800:13:08Science & Medicine

The universe is incredibly old, astoundingly vast and populated by trillions of planets -- so where are all the aliens? Astronomer Stephen Webb has an explanation: we're alone in the universe. In a mind-expanding talk, h...

About This Episode

Where are all the aliens? Stephen Webb is an episode from TEDTalks 科学と医療 by TED. The universe is incredibly old, astoundingly vast and populated by trillions of planets -- so where are all the aliens? Astronomer Stephen Webb has an explanat...

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Published Jul 19, 2018, 00:13:08 long, audio available.

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