There is an old history concept map for illustrating the history of old age, middle age, and prehistory, and showing the historical background of functional diversity. Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominids c. 3.3 million years ago. Old age refers to ages nearing or surpassing the life expectancy of human beings. Check more details from this concept map and try to make your own concept map.
