The Fermi Parazox
Don't you think that since there are unbelievably large numbers of habitable planets within our galaxy that we should have received some sort of transmission from an alien lifeform? Well, the Fermi paradox suggests that there is a concept that exists called the Great Silent Forest within space. Basically, the Great Silent Forest is a theory that every alien planet in our galaxy is aware of some danger that we are not aware of, therefore they are not reaching out for fear of being detected by said danger.
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