Where are all the aliens? | Stephen Webb

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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.

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13 Comments

  1. Galaxy and Universe population had to start somewhere and maybe we are that starting population. If so, in another few thousand years we should be spread across our galaxy. Maybe sooner if technology keeps advancing at the present rate.

  2. how often do you find man-made things under the sand (lost items, mines, treasures, etc)? and there are far far far more planets in the universe than all the grains of sand on earth.

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