It is because of his brain that he [modern man] has risen above the animals. Guess which animals he has risen above.

If a cat does something, we call it instinct; if we do the same thing, for the same reason, we call it intelligence.

Frogs will eat red-flannel worms fed to them by biologists; this proves a great deal about both parties concerned.

As Darwin puts it in The Descent of Man, 'Male snakes, though appearing so sluggish, are amorous.' Isn't that just like Darwin? It was one of his main ideas, you know, that the males of almost all animals have stronger passions than the females. Since then we've learned a thing or two. At any rate, the female snake is right there when spring arrives in the woods.

The hippopotamus looks monogamous- he looks as if he would have to be.

Alexander III of Macedon is known as Alexander the Great because he killed more people of more different kinds than any other man of his time.

The Earthworm plows the whole world with his tunnels, drains and aerates the earth… If you ever buy any land, be sure it has plenty of Earthworms toiling and moiling all day so that you can sit down and relax.