1. Evolution
By means of radioactive dating, the ages of rocks in many places on earth have been determined. ... Humans do not have a need to digest rocks; therefore, their appendix is fairly small and useless. ... They interact in small social units, families of two to six members, and they have the ability to invent their own culture, for example, tool making. ...
- Word Count: 2536
- Approx Pages: 10
- Grade Level: Undergraduate