Honestly i believe UFO'S and aliens do exist and that they have visitede us hete on earth.
It would be very strange if only this planet called earth was populated.
How about you? What do you believe or think of the UFO/Alien topic?
Why is it so "scary" to admit that they might exist?
I think its plausible that intelligent aliens could exist somewhere else in the Universe, but it depends on how rare the development of advance intelligence is and whether such species could survive long enough.
Looking at Earth there have been some massive extinctions throughout our history. But also as far as we know, out of all the millions or billions of species that have developed here, only one have reached advanced intelligence, which could suggest that it might be fairly rare.
Then we have the whole issue of travelling around the Universe at speeds which would make visiting others possible, and as far as we know this is not exactly easy or even possible.
And last I personally don't think an alien lifeform with such capabilities would be particularly scared of making their presence known for us. They would be like God(s) compared to us with absolutely nothing to fear. I also think such lifeforms would be much more enlighten in regards to existence than we are and value peace and collaboration above anything else. So I don't think they would be hostile or would want to steal our resources or probe us etc. as we are often presented with in science fiction movies.
I think they as humans have now, would have gone way past the idea of exterminating other lifeforms simply for doing so. Like if we for some reason found life on Mars, we wouldn't go there with the intention of getting rid of it.
If we are just talking lower alien lifeforms, I think there is a lot of it in the Universe, but given the size of it, it might appear to us as if there is hardly any.
So all in all, I don't really buy the idea of them having visited us and would need solid evidence before believing this to being the case.