Not that we know of at the moment, but it seems probable. Little green men in flying saucers kidnapping people from country roads – probably not, but space is so huge and so full of countless numbers other stars and planets that having life appear in only one place would seem unlikely. We don’t know what that life would look like, how complicated it might be, how long it might last or where to look for it, but there are people looking. If there is complex, intelligent life close enough to us to be able to talk to, they haven’t yet thought the same of us.
I think so, but we don’t know! I don’t think that they will look like the little green men in the movies, and I don’t think they have visited earth. Rather, I think that it is very likely that there are many different microbes and forms of life that we can’t imagine yet.
I think it would be possible, although aliens probably won’t look like ET, but likely a life form that we don’t know of yet. The universe is so big that surely we can’t be the only living beings out there!
By probability, there must be. I don’t think we’ve encountered any of it yet, and we may not realise it when we first make contact. Any life is likely to be as different to us as we are to fish or ants, or even more so as the other lifeform may not breathe oxygen!
I am answering with a quote by Stephen Hawking. “Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on earth.” 🙂
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