Against: If aliens existed they would have contacted the leaders of Earth and made themselves known. There is no physical evidence that aliens exist or have ever visited our planet.
For: For thousands of years people claim to have seen strange things in the sky, visitors that come from the sky, people having memories of being taken by non-human beings and having experiments preformed on them against their will. Alien crafts and aliens on ancient coins, ancient artwork and even as far back as drawings on cave walls. People drawing and creating images of non-humans. Countless photos and videos of space craft. The Roswell crash site. The video tape of alien autopsies by the military. These are just a few of the arguments for why aliens exist.
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.
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.
There is no evidence that aliens exist therefore the biology of aliens, if they do, is unknown
No
No!
aliens, Might exist but their are rumours that they probe people.
its not that u are cray if u think aliens exist ,if someone says the exist and someone says they dont exist , just respect there answers
If we were there, we would be aliens. If they were here, they would be the aliens. Depends on the type of alien.
I don't think they eat anything. You have to exist to need food, and no aliens are as yet known to exist.
if aliens do exist, then yes
According to most people, aliens would ride in saucer-shaped UFO's. It is not known if aliens exist or not, so we cannot know for sure if aliens exist, let alone what they actually ride in.