"The Age of Fire": The ice age is coming, and Ling, an abandoned girl from the tribe, leads the old and weak to dig ice in the frozen soil to fish. She used reindeer bones as spears, burned turpentine to store fire, and even discovered the secret method of storing hay in bear dens. When the tribesmen were eating roasted meat around the campfire, she was using flints to hunt pictures under the rock paintings.
