“The Fermi paradox, named after Italian-American physicist Enrico Fermi, is the apparent contradiction between the lack of evidence for extraterrestrial civilizations and various high estimates for their probability.” Wikipedia

We are not alone in the universe. Our insignificant planet, in an insignificant solar system, in an insignificant galaxy, in an insignificant part of the universe, can’t be the only place intelligent life exists. So where are the aliens? Why haven’t we discovered them or why haven’t they discovered us?

The universe is incredibly large to a scale we can’t really comprehend. Beyond our galaxy, stars that we see are so far away that it takes hundreds of thousands to millions to billions of light years for light from them to reach us. Think about that… that means that any of those stars that have planets with intelligent life, who might be looking at the light from our sun, is seeing that light from a time when humans were prehistoric or non-existent. They can’t look through a telescope and see our human satellite encircled earth, they can only see a planet that might have water, in the Goldilocks zone where life as we know it might exist.

It is hard to conceive of the distance and relationships between time and space that make our discovery of other life so unlikely, even if their existence is very likely. Our earth is 4.5 billion years old and the first satellite, Sputnik 1, was only launched 64 years ago.

What I also wonder about is the limits of intelligence. None of our great civilizations lasted very long. Maybe the intellect and intelligence of our species, and any intelligent alien species, has a very small window of time to find other intelligent life. Maybe the same holds true for all other intelligent life that might be looking for us.

In the short time that we have been able to leave the gravitational pull of earth, we have gone through a Cold War where we were on the brink of destroying ourselves, and we have harmed our environment to a level where we have altered the climate. Maybe from the time we can look to the stars through telescopes until we destroy ourselves, will only span a time of a few hundred years?

Think about this: in less than a hundred years a high school aged kid could have the technology and access to resources to create a weapon that involves splitting atoms… or create a deadly virus that’s 1,000 times as deadly as Covid-19. That’s in their basement, with easily acquired resources, and no university degree. With the advancement of science and knowledge, comes easy access to dangerous knowledge.

Maybe there are hundreds or thousands of intelligent species out in the universe but from the time they are intelligent enough to look beyond their universe for life, until they destroy themselves, is so small that most of them are already extinct. Or they exist now, but the light we see from their solar system is coming from so far away, we are literally only able to see their prehistoric past.

It’s a bit of a depressing thought, but maybe we will never find aliens and they will never find us, because as intelligent as we and they may become, a world-ending knowledge will undermine our/their abilities to keep searching long enough.

(And I didn’t even factor in Artificial Intelligence taking over and not having the same inquisitive nature to explore the heavens.)