The wren-box problem is becoming more acute each year, for wrens now demand better housing conditions and labor-saving devices.

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.

Young normal tigers do not eat people. If eaten by a tiger you may rest assured he was abnormal.

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.

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.

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

The sloth lives his life upside down. He is perfectly comfortable that way. If the blood rushes to his head, nothing happens because there is nothing to work on.