“If we were made of some rare isotope of Bismuth you might have an argument for us being alone in the cosmos”
One of the things that often comes up when discussing topics related to space or future technology is the Fermi paradox. Quite simply put, this begs the question that if the universe has been around for billions of years, where are all the aliens? There’s been ample time for them to evolve and either travel to our planet, or for the radio traffic they generated (perhaps millions of years ago) to reach us and be picked up by the likes of the SETI institute.
Figure 1: Where’s ET?
As a result the Fermi paradox is often cited by those who favour the rare earth hypothesis (REH). This states that the chances of a planet evolving life, never mind intelligent life, are so rare…
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