Are there any aliens?

Aliens exist, but current science can't even fully explore the galaxy, let alone other creatures outside hundreds of millions of planets. So now we can only wait for the lifetime to explore the clues that can prove the existence of aliens.

No aliens have been found, but it is uncertain whether there are any.

There have been many books that have published aliens** in the collections of American laboratories, but they are all fake. In 2005, these things were demystified. The aliens we all know are prostheses made by the United States when it conducted top-secret experiments.

Absolutely. There are tens of billions of planets in the Milky Way galaxy alone, and the Earth is definitely not isolated.

No. Extraterrestrial microbes are possible.

Earthlings are limited in their abilities. We haven't found it yet, but we're looking, and maybe aliens are looking for us.

I want to know where they are, and I'm developed.

There are about 100 billion (galaxies) multiplied by 3 billion (the number of stars per galaxy) stars in the universe. Who's to say that out of so many "solar systems", none of them can give birth to life?

I guess there must be other extraterrestrial life or aliens in the universe. It's just that we haven't found out yet! The size of the universe is measured in hundreds of millions of light-years, and it is impossible to see this far with an optical telescope.

So you can only use radio telescopes to collect signals from the universe, but even if there are signals of extraterrestrial life, it will take hundreds of millions of years to come from such a distant place. If you think about how many years of human history it is, you know.

As I have seen before, humans say that the observed universe is less than 1,1000.

Landlord, I don't want to fight anymore, I believe you will have your own ideas. If there is a mistake, please forgive me)

Are there any aliens? According to the Fermi paradox proposed by the famous Nobel laureate Fermi, if there are aliens, then they may have come to Earth and exist somewhere, but they just didn't communicate with us, maybe our technology is too backward to detect them; Or that there is no other civilization in the universe.

Are there any aliens? According to the Fermi paradox proposed by the famous Nobel laureate Fermi, if there are aliens, then they may have come to Earth and exist somewhere, but they just didn't communicate with us, maybe our technology is too backward to detect them; Or that there is no other civilization in the universe.

No evidence of extraterrestrial existence has been found for the time being.

The universe is so big that there are no surprises.

The universe is so big, and there is a universe outside the universe, wouldn't it be too wasteful to have only human beings?

There is no clear answer to this question yet.

Creatures from other planets are also asking.