When he felt the pangs of hunger he ate raw leaves and the roots of
plants or he stole the eggs from the nest of an angry bird.

Once in a while, after a long and patient chase, he managed to catch a
sparrow or a small wild dog or perhaps a rabbit These he would eat raw,
for prehistoric man did not know that food could be cooked.

His teeth were large and looked like the teeth of many of our own
animals.

During the hours of day this primitive human being went about in search
of food for himself and his wife and his young.

At night, frightened by the noise of the beasts, who were in search of
prey, he would creep into a hollow tree or he would hide himself behind
a few big boulders, covered with moss and great, big spiders.

In summer he was exposed to the scorching rays of the sun.

During the winter he froze with cold.

When he hurt himself (and hunting animals are for ever breaking their
bones or spraining their ankles) he had no one to take care of him.

He had learned how to make certain sounds to warn his fellow-beings
whenever danger threatened. In this he resembled a dog who barks when a
stranger approaches. In many other respects he was far less attractive
than a well-bred house pet.