Aliens Quote by Neil deGrasse Tyson

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

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

— Neil deGrasse Tyson

The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us.

— Bill Watterson

The surest sign that intelligent life exists somewhere else in the universe is that it has never tried to contact us.

— Young Siddiq Prince

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

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

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

— Anonymous

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

For all we know, the aliens have already done this and unwittingly concluded that there was no intelligent life on Earth. They would now…

— Neil deGrasse Tyson

I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.

— Arthur C. Clarke

I'm skeptical of claims that we've been visited by aliens from another planet or other dimension, but I don't rule it out 100 percent.…

— Leroy Chiao

Nobody has ever convinced me that ancient aliens have visited Earth. Not even close.

— Dan Brown