Home / Series / TED Talks / Aired Order / Season 2018 / Episode 221

Stephen Webb: Where are all the aliens?

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, he spells out the remarkable barriers a planet would need to clear in order to host an extraterrestrial civilization — and makes a case for the beauty of our potential cosmic loneliness. "The silence of the universe is shouting, 'We're the creatures who got lucky,'" Webb says.

English
  • Originally Aired July 19, 2018
  • Runtime 15 minutes
  • Production Code StephenWebb_2018
  • Original Network YouTube
  • Parental Guideline TV-PG
Name Type
Stephen Webb Guest Star

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