Found Quote by Leroy Chiao

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

— Albert Einstein

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on…

— Stephen Hawking

[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

Even if there is intelligent life somewhere, which perhaps there is, I'm agnostic about it, I don't know.

— Luka Jones

I don't see why there is no intelligent alien life in the universe.

— Neil deGrasse Tyson

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 believe that there may be intelligent life on other planets.

— Pat Buckley

Is there intelligent life on Earth?

— Frank Drake

I think it's fantastically narcissistic to believe that in the entire universe, with all of the planetary systems that we've already discovered and the…

— Ian Bremmer

Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

— Bill Watterson

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

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

— Forest Whitaker