Earth Quote by Frank Drake

Only when science and technology are used with human concern in a world in which all of the earth's resources are held as the…

— Jacque Fresco

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

— Albert Einstein

There is intelligent life on Earth, but Im just visiting.

— Anonymous

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

— Pat Buckley

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

To me, it's the kind of interesting question the human race should be investing in. Is there intelligent life out there? Are there other…

— Paul Allen

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

— Luka Jones

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

— Sylvia Earle

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

— Neil deGrasse Tyson

[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

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 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