Where are all the aliens? | Stephen Webb

in #astronomy • 6 years ago


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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Posted from my blog with SteemPress : https://www.thepause.com/ted-talks/where-are-all-the-aliens-stephen-webb/
#cosmos #exploration #physics #planets
6 years ago in #astronomy by
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