Yes. They probably are watching us now. And no, i am not insane.
There is no proof that aliens exist. I believe there is no such thing as aliens. Has anyone seen an alien ship? Has anyone seen an alien? No.
This question cannot be answered because it is unknown if aliens exist, and we would have to know that they exist before we could research them, and find information like your question.
Aliens, if they exist, would likely have biological processes similar to those on Earth that produce gases as byproducts of digestion. Burping could be a way for them to release excess gas from their digestive system.
Nothing. There are no aliens known to exist.
If space aliens do indeed exist, they exist for the same reasons we exist. Whatver those reasons may be.
Yes they actually existed... It does not only direct to aliens as "UFO's" or living from outside the Earth. Aliens can also be directed as those people who are deviating the norms; those who act differently from the society. They can be alienating themseoves from us.
It could be possible if centauroid aliens exist that they may have six legs, maybe even 10 legs.
There is no evidence that aliens exist therefore the biology of aliens, if they do, is unknown
We have no knowledge about aliens either within our own galaxy or outside of it. This doesn't mean they don't exist; our galaxy is simply too large, and we haven't explored even the closest stars - at least, not so thoroughly that we can be sure there are no aliens.
This question makes no sense. If people could prove whether or not aliens exist, then conspiracy theories would be a thing of the past. Again, this question makes no sense.
It has not yet been established if aliens actually exist. But if they do, yes, they could very well be living in the oceans because for all that we know, they are absolutely unknown species.
No