Biology Quote by Pierre Teilhard de Chardin

Is evolution a theory, a system, or an hypothesis? It is much more: it is a general condition to which all theories, all hypotheses,…

— Pierre Teilhard de Chardin

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

Evolution is a theory in a special philosophical sense of science, but in terms of ordinary laymen's use of language, it's a fact, ..…

— Richard Dawkins

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) general condition to which all theories, all hypotheses, all systems must bow and which they must satisfy henceforward if they are to be…

— Pierre Teilhard de Chardin

Evolution is a fact. It is the best explanation of what is known from observations. It's a theory as powerful as the theory of…

— Donald Johanson

Evolution is far more than a belief or an educated guess about how people came to be as they are. It is, in fact,…

— Alan I. Leshner

“I have a little urge to all the rational thinkers in the world, both scientists and non-scientists. Because of the fact that many of…

— Abhijit Naskar

Evolution is a theory, and it's a theory that you can test. We've tested evolution in many ways. You can't present good evidence that…

— Bill Nye

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

I never say that evolution is a fact. Evolution is a theory. It's much more important than a fact, because theories explain things.

— Eugenie Scott

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