A rill in a barnyard and the Grand Canyon represent, in the main, stages of valley erosion that began some millions of years apart.

Splitting and gradual divergence of genera is exemplified very well and in a large variety of organisms.

The fact -- not theory -- that evolution has occurred and the Darwinian theory as to how it occurred have become so confused in popular opinion that the distinction must be stressed.

I have a debt, a loyalty to the museum; the best place for me to do what I wanted to do.

I don't know where to put whales. I'm sticking them here, but I don't have any reason for it.

Man is the result of a purposeless and natural process that did not have him in mind

Species evolve exactly as if they were adapting as best they could to a changing world, and not at all as if they were moving toward a set goal.

The search for historical laws is, I maintain, mistaken in principle.

...the argument from absence of transitional types boils down to the striking fact that such types are always lacking unless they have been found.

It is inherent in any definition of science that statements that cannot be checked by observation are not really saying anything or at least they are not science.

The science of systematics has long been affected by profound philosophical preconceptions, which have been all the more influential for being usually covert, even subconscious.

I wanted the monster back and that was plainly wrong.

We ought to walk in the bright light.

We need intelligence in this country. We need a certain toughness in this country, or we're going to end up like a lot of the other places, and we're not going to have a country left.

Education has in America's whole history been the major hope for improving the individual and society.

Brave words in a room full of pulseless creatures. Spade gave Don a disgusted glance while Rodney just licked his lips. No doubt he was mentally salting and peppering Don.

When I did the sitcom I was too naive. I thought, Well, they know what they're talking about, let's do that.

Every act of kindness and compassion done by any man for his fellow Christian is done by Christ working within him.

I love radio - its immediacy and especially its intimacy... it is part of your life, whispering into your ear. You can't see it, but equally importantly it can't see you.

People will admit to arson and mayhem sooner than no sense of humor.

It doesn't matter so much where the material comes from, as long as it's good.