'Where are they?"
Chatting with his colleagues over lunch in 1950, Fermi supposedly asked, 'Where are they?' our own galaxy contains billions of stars and there are billions of galaxies in the universe, so that is trillions of stars. If just a fraction of those anchored planets, that's a lot of planets. If a fraction of those planets sheltered life, then there should be millions of civilizations out there. So why haven't we seen them? Why haven't they got in touch with us?
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