Are there aliens?

Of course there are aliens. In the vast universe, we humans can't be lonely. However, the "aliens" here should be exactly "extraterrestrial intelligent life". They look different from us and have different physiological structures, so naturally they can't be called "people".

In the first half of this year, the famous astrophysicist Hawking publicly stated that there are indeed aliens in the universe, and he can prove this by data alone. He guessed that aliens might live in large spaceships and wander around in space looking for suitable planets to invade. So he suggested that we had better not talk to aliens.

However, I think that the so-called aliens are actually very likely to be our descendants. In a few years, our technology will be much more developed than it is now. At that time, maybe we invented flying saucers, which can travel back in time. At that time, maybe our appearance evolved into what we now call "aliens". At that time, in order to study "the ancients" (that is, now we) and "the ancient earth", we returned to the present earth by flying saucer.