How old is man? Where did he come from? How did he live? Less than a hundred years ago, people did not know. Then, exciting clues were discovered - hatchets made of stone, paintings drawn in caves, and skeletons of prehistoric beasts and prehistorie man. Step by step the puzzling pieces were put together until finally the great mystery was solved. Here is a story that spans a million years - the story of the first men in the world.