Assuming Quote by Jack McDevitt

Intelligence is the ability of a species to live in harmony with its environment.

— Paul Watson

Intelligence is based on how efficient a species became at doing the things they need to survive.

— Charles Darwin

“Certainly on this planet it is not apparent that there are beings more intelligent than humans, although a case can be made for dolphins…

— Carl Sagan

Most of the intelligence out there must be artificial intelligence. We keep looking for critters like us living on a planet like ours, where…

— Seth Shostak

If we find life out there, and it's not us, we will deem it not intelligent. But what may be equally as likely is…

— Neil deGrasse Tyson

I don’t care about someone being intelligent; any situation between people, when they are really human with each other, produces ‘intelligence.

— Susan Sontag

From the lowest animals of which we can affirm intelligence up to man this type of intellect is found.

— Edward Thorndike

“Was intelligence an inevitability, a consequence of evolution? Bacteria succeeded without a brain, possessing survival skills that rivaled their biological hosts. So why should…

— Todd Crawshaw

No human is more intelligent than the other...just more adept at certain areas of intelligence.

— Siddharth Katragadda

“The entire evolutionary record on our planet, particularly the record contained in fossil endocasts, illustrates a progressive tendency toward intelligence. There is nothing mysterious…

— Carl Sagan

“Intelligence is overrated by any species that has it, and that's provable by the fact that all intelligent species are outlived by a factor…

— L.E. Modesitt Jr

It takes something more than intelligence to act intelligently.

— Anonymous