Real people, people who can create tools, have appeared in the last one million years. For a long history of the development of the earth, one million years is only a short time, but compared with the history of human beings with written records, After all, it is too far away. People always want to figure out what happened between these million years. This passage mainly supports the argument that:. ['The earliest humans originated a million years ago.', 'Humans are special creatures of biological development in nature.', 'The earth is too long than human history.', 'The mystery of human origin always causes people to search for human development.']