No one really knows for sure. But, there's no way we are the only form of life in this universe.

I believe in aliens due to the fact that we can't be the only form of life in the universe there are loads of undiscovered planets also who knows they could already be discovered just the government wouldn't say if they have been discovered

TomorrowLand wrote I believe in aliens due to the fact that we can't be the only form of life in the universe there are loads of undiscovered planets also who knows they could already be discovered just the government wouldn't say if they have been discovered

Totally agree, if aliens were announced there would be world wide panic/Arguments due to religion facts.

I think that it's pretty much impossible for there to be nothing else out there.
There is trillions of planets in the known Universe and we don't even know the entire Universe, we can't actually perceive all of it yet.

I've recently become a very big doubter in the Ancient alien theory, so while I think it could be possible that we've been visited in the past, I don't believe they are currently flying around us, have been captured and are being stored in Area 51 or are living under the Bermuda triangle.

i really dont think that aliens exist...

It is ignorant to think we are the only life in this universe.
If we live in a infinite universe like some think, there is a high chance there is a exact clone of yourself in some other world.

I think there is. Aliens don't literally have to be creepy green/grey dudes with big heads.

But there's good odds that there are so many other planets with or that can sustain life. We just haven't discovered them because we're limited to our knowledge. We can't even put a guy on Mars yet

I am a true believer that it is impossible for us to be the only life form out there in this massive universe, but I doubt they will be anything like what hollywood portrays as aliens.

I think I believe in aliens - I'm not too sure actually.

I guess like TomorrowLand said, we can't be the only form of life in the universe. So many other planets, it can't just so happen to be that Earth is the ONLY one with life on it? No way.