Things You Didn't Know Before

[Praxit]

I don't completely rule out the possibility of aliens visiting us, however, I think it's very unlikely.

First, for them to even know we exist, radio waves and/or evidence of life here (such as might be detected through spectroscopy of the light through our atmosphere) would have to have reached them. We've only been advanced enough for that to happen since around 1900, which means the aforementioned light or radio waves would have only traveled about 125 light years. Even if an alien civilization were to detect us and be interested, and have the ability to travel at light speed, their planet (or ship, or whatever) would have to be within about 60-65 light years from us, in order to receive the information and travel here

Now consider how long it took, since the Big Bang, for life to form here on Earth, then how many mass extinction events took place before intelligent life had the opportunity to come about. Not only do we have the whole "Goldilocks Zone" thing, but we have Jupiter clearing a lot of potential Earth killing asteroids and such. Most of the star systems we've seen don't seem to have that advantage.

There are many other considerations as well, so what I'm saying is that, while I certainly believe there's plenty of life, and much of it intelligent, out there, I doubt there's any close enough and intelligent enough and interested enough to visit us.

Just my opinion.

..I agree, I also think some type of life form exists. Its just to far from us.

But if they have visited us, that's some serious technology they are using.