Ask Ethan: What should humanity’s message to the Universe be?
One of the greatest open questions in all of the Universe today is just how abundant intelligent alien life is right at this very moment. We can imagine that extraterrestrial intelligence is common, and that the Milky Way is swarming with civilizations — thousands or even millions of them — just as intellectually advanced or even more technologically advanced than we are. Alternatively, we could…
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