Biology Quote by Richard Dawkins

I think it's a theory, the theory of evolution and I don't accept it as a theory.

— Ron Paul

Evolution is an organizing principle and when we call it a theory, we mean it's a theory, we don't mean that it's a belief…

— Alan I. Leshner

The theory [of evolution] is a scientific mistake.

— Louis Agassiz

Evolution as such is no longer a theory for a modern author. It is as much a fact as that the earth revolves around…

— Ernst Mayr

People sometimes try to score debating points by saying, Evolution is only a theory. That is correct, but it's important to understand what that…

— Richard Dawkins

“This is what creationists say of evolution, that it’s “only” a theory, it hasn’t been proved, as though this in itself is grounds for…

— Daniel Quinn

Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it…

— Karl Popper

Evolution is a bankrupt speculative philosophy, not a scientific fact.

— Jimmy Swaggart

The fact -- not theory -- that evolution has occurred and the Darwinian theory as to how it occurred have become so confused in…

— George Gaylord Simpson

“The problem Creationists identify is with the word 'theory', not with the case for evolution”

— Lance Parkin

The theory of evolution, like the theory of gravity, is a scientific fact.

— Neil deGrasse Tyson

Some claim evolution is just a theory. As if it were merely an opinion. The theory of evolution, like the theory of gravity, is…

— Neil deGrasse Tyson