Ever hear of the Fermi paradox?
In a nutshell, here’s what it means;
Fermi was an American physicist who He was stumped by the glaring contradiction between the lack of evidence for
extraterrestrial civilizations elsewhere in the Milky Way galaxy and high
estimates of their probability.
The main points of the Fermi
paradox are these;
There are billions of stars in
the galaxy that are similar to the Sun and many of these stars are billions of
years older than the Solar system.
Scientifically there is a high the probability that at least some of these stars have Earth-like planets and if
the Earth is typical, some may have already developed intelligent life. Some of
these civilizations may have developed interstellar travel, a step the Earth is
investigating now.
Following that reasoning, and
based on rock-solid scientific calculations, we should have been visited by extraterrestrial
several times by now.
But we haven’t, which leads to
what is called the Great Filter, a theory that says that all existing species of
life encounters a stage of evolution so hard to endure it eliminated most
civilizations, here or in outer space.
There is also another theory.
According to a study published in
2019 in The Astronomical Journal, the Milky Way galaxy could be filled with
alien civilizations, but that extraterrestrial life might be taking its time to
fully explore the galaxy, even using the movement of star systems to make this
type of journey easier.
Jonathan Carroll-Nellenback, a
computational scientist and the study's lead author said "If you don't
account for the motion of stars when you try to solve this problem, you're
basically left with one of two solutions. "Either nobody leaves their
planet, or we are in fact the only technological civilization in the
galaxy."
In other words, stars and planets
orbit the center of the Milky Way on unique paths at varying speeds, and they
sometimes zip past one another as they travel. Aliens, according to the report, could
simply be waiting for their next destination to come closer to them.
