Others became like monkeys, and still others became like horses.

THINGS TO DO

Look at the picture above and tell how this animal must have changed to become more like a dog, a cat, a pig, a cow, or a horse.

[XVII.]

THINGS TO THINK ABOUT

What part of the wild horse’s foot touched the ground when he ran?

What happens to muscles that are not used? What happens to muscles that are used most?

The Story of the Wild Horse

Perhaps you have seen the zebra.

If you have, you must have noticed its stripes.