Astronomy Quote by Michio Kaku

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

— Neil deGrasse Tyson

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

— Pat Buckley

Perhaps, as some wit remarked, the best proof that there is Intelligent Life in Outer Space is the fact it hasn't come here. Well,…

— Arthur C. Clarke

I hope that someday we will find evidence that there is intelligent life among humans on this planet.

— Sylvia Earle

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

That intelligent creatures exist in outerspace is proven by the fact that they have not contacted us.

— Loesje

We have never denied that it is possible, indeed probable, that other forms of life, even intelligent life, exist in the universe. But this…

— Paul Kurtz

I wonder if, in fact, we have been observed by aliens and upon close examination of human conduct and human behavior they have concluded…

— Neil deGrasse Tyson

If this is the only planet on which not only life, but intelligent life, has arisen, that would be very unusual.

— Seth Shostak

There may be aliens in our Milky Way galaxy, and there are billions of other galaxies. The probability is almost certain that there is…

— Buzz Aldrin

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

— Paul Horowitz