To know whether there are more people or more nature, the earth and the universe are constantly exchanging substances.
Spaceships, rockets, volcanic eruptions, meteorite impacts, etc., many substances escape to the outside of the atmosphere, and many substances are captured by the earth into the atmosphere.
There is a prophecy about the origin of life, and life follows meteorites into the earth.
So suppose this possibility exists, and the earth people are aliens.
It doesn't matter if it's not established.
There must be traces of life on those substances that escape from the earth.
It has been found that many bacteria and microorganisms can survive in harsh environment.
They may one day accidentally find a new home like us, where they will develop their wisdom and become aliens.
Under the influence of infinite time, if we always exist with them, one day, we will always meet.
However, in my personal opinion, this is very dangerous.
It may bring a devastating blow to the weak side.
Put yourself in others' shoes. If you represent the earth people, what is your first thought when you find aliens?
I guess it should be to get what is good for us and stay away from what is harmful to us.
In order to gain an advantage, we must plunder each other.
In order to avoid harm, we must destroy each other before destroying ourselves.
So, if there are aliens, I hope we can enjoy ourselves safely forever in a place where we can never meet each other.