Alien Quote by Stephen Hawking

Intelligent life can't be all that common because it's really rare on Earth and especially since we define ourselves to be intelligent. But in…

— Neil deGrasse Tyson

[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet…

— Anonymous

[My study of the universe] leaves little doubt that life has occurred on other planets. I doubt if the human race is the most…

— Harold Urey

I do believe there's life other than on our planet.

— Forest Whitaker

It's overwhelmingly likely that life exists on other planets.

— Paul Horowitz

Obviously there's some kind of life elsewhere. I don't know whether it would look like anything we recognise but I do believe in aliens.

— Ant McPartlin

I think there's all kinds of life out there, including intelligent life, but the reason we haven't found each other is because of vast…

— Leroy Chiao

Intelligent life on other planets? I'm not even sure there is on earth!

— Albert Einstein

I believe that there may be intelligent life on other planets.

— Pat Buckley

Mathematically speaking, it seems impossible that there isn't life out our planet. If you flick on the news, it certainly seems like we have…

— Ryan Reynolds

The real question is not are there other forms of life in the universe, but are there other intelligent forms of life out there…

— Ian Bremmer

I think more and more scientists are becoming convinced that it's very likely that life forms of some kind exist all around the universe…

— Ron Howard