1. The Great Leap Forward
... one significant change occurred when our ancestors began to walk upright. This allowed them more use of their arms and hands. 3 million years ago the species divided into two, possibly three hominid species. These two types of man evolved differently. Only one survived. About 2.5 million years ago man ... elderly. It is possible that Cro-Magnon replaced Neanderthal many surviving the ice-age. Another possibility is that by entering into areas inhabited by Neanderthals, the Cro-Magnons inflicted them with diseases that Neanderthal man was not able to resist. They maybe drove them off of...
- Word Count: 469
- Approx Pages: 2
- Grade Level: High School