How the pig in the struggle of life won out as usual.
Why the peacock has such a fine tail and how he overdid it.
How the elephant saved his life by lengthening his nose.
How the birds traded their teeth for feathers.
How shelled creatures coiled and uncoiled their shells.
Why we miss the "missing links." (As you go into this subject of evolution you will hear a good deal about missing links.)
How they know butterfly wings are made first and the coloring and patterns laid on afterward.
How much of a butterfly's beauty is probably known to the butterflies themselves.
How Nature seems to make things just to be pretty.
And these are just a few of the things in one of Doctor Wallace's books.[60]