Astrophysicist and cosmologist Avi Loeb offer another possible solution to it:
“We used the most conservative approaches to understanding the appearance of life in the universe, and our conclusion is that we are very early in the process…”
That is, aliens haven’t visited us yet, because, in fact, it’s our job to visit them… We’re the ancient and old and nasty and scary ones Hollywood is warning everyone about…
That actually makes sense to me… 😀
The Fermi Paradox:
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. With high probability, some of these stars have Earth-like planets, and if the Earth is typical, some may have developed intelligent life. Some of these civilizations may have developed interstellar travel, a step the Earth is investigating now. Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in a few million years. According to this line of reasoning, the Earth should have already been visited by extraterrestrial aliens.
In an informal conversation, Fermi noted no convincing evidence of this, leading him to ask, “Where is everybody?”