Fermi’s Paradox in a nutshell:
‘We’d estimate that there are 1 billion Earth-like planets and 100,000 intelligent civilizations in our galaxy.’ So there must be aliens. Why haven’t we heard from them?
If this fascinates you, check out this list of solutions to the Fermi Paradox.
You may not be convinced there is an answer to this problem, but for some, they will be.
(Image of Enrico Fermi from Wikimedia)