21.   The idea is to maintain lawns much as grazing animals did, trimming little but often.

22.   The prevailing thought in the Middle Ages was that the devil could make animals do bad things.

23.   The whistle bridges the gap from the instant the animal does something correctly until the time it takes for him to get his fish.

24.   This is what animals do, without emotional complexity.

25.   This time, male mice lost their elevated pain thresholds, but female animals did not.

26.   We sat and watched wild animals do what they do when no one is watching.

27.   Whatever the animals did or tried to do to him, he did not regard himself as their boss.

28.   When a chimp sees a human pointing, it focuses on the finger itself, as do other animals.

29.   When the animals did not, they often got into trouble.

30.   Why do animals do the strange things they do, and how do we stop it?