What is the purpose of talk. The purpose of talk.origins is to provide a forum for discussion of issues related to biological and physical origins. See the talk.origins Welcome FAQ , the Archive welcome file and the Talk. Origins Archive's Must-Read FAQs . I thought evolution was just a theory.
Biological evolution is a change in the genetic characteristics of a population over time.
That this happens is a fact. Biological evolution also refers to the common descent of living organisms from shared ancestors. The theory of evolution describes the mechanisms that cause evolution. So evolution is both a fact and a theory. See the Evolution is a Fact and a Theory FAQ , the Introduction to Evolutionary Biology FAQ and the Five Major Misconceptions about Evolution FAQ .