- Question
Do aliens exist?
It's a question humanity has pondered for centuries. People have throughout time reported seeing mysterious objects flying in the sky, sightings of little green men, and even being abducted. But is this just the stuff of imagination? Does life exist in outer space? Or are we really all alone?
Yes, alien life does exist outside of Earth
This position holds that alien life exists beyond Earth. Its arguments range from the claim that aliens have already visited us, to scientific accounts of how life could arise independently elsewhere or be seeded across worlds through natural or accidental panspermia.
No, alien life doesn't exist elsewhere in the Universe
This position holds that alien life does not exist anywhere else in the universe. It argues that no extraterrestrial life — not even simple microbial life — exists or will ever exist beyond Earth, making humanity and terrestrial life unique in the cosmos.
Probably, but we don’t yet have proof of alien life
People taking this view consider that in a Universe where there are enormous numbers of worlds like ours it is likely that life has arisen many times. But until we have evidence we don’t know for sure
Detection or contact with an alien life form is not possible
This position holds that detecting or contacting alien life is not possible, making the question of its existence almost irrelevant. It argues current technical means cannot identify alien life, noting the SETI project has yielded no evidence despite long searching.