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

A few Cobras in your home will soon clear it of Rats and Mice. Of course, you will still have the Cobras.

Galvani was mistaken about the amount of electricity in frogs, but he had some good ideas, too, for the galvanometer is named in his honor, and you don't have galvanometers named after you merely for making a mistake about a frog.

Just when you're beginning to think pretty well of people, you run across somebody who puts sugar on sliced tomatoes.

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

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.

Cæsar might have married her [Cleopatra], but he had a wife at home. There's always something.