Why The Silence From Space Proves Nothing About Aliens
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Have we really searched the galaxy for alien life — or have we barely looked at all? For more than 60 years, humanity has listened for signals from other civilizations. Radio telescopes have scanned the sky, SETI has searched for artificial signals, and astronomers have found thousands of planets around other stars. Yet the sky remains silent. But that silence may not mean what most people think. Compared to the true search space of the Milky Way, our search for extraterrestrial life is shockingly tiny — like putting a coin on a table and calling that table the entire galaxy. We have searched only a small local bubble of stars, listened for only a tiny slice of time, and scanned only a fraction of the possible frequencies, directions, signal types, and technologies another civilization might use. The ingredients for life are common: carbon, hydrogen, oxygen, nitrogen, water, organic molecules, and energy sources are scattered across the universe. Life appeared on Earth almost as so
Tags: insane curiosity, space, science, astronomy, where is life in the universe, alien life, extraterrestrial life, are we alone, Fermi paradox, search for extraterrestrial intelligence, Milky Way aliens, alien civilizations, life in the universe, exoplanets, biosignatures, Drake equation, intelligent life, alien signals, why haven't we found aliens, great silence
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