What you’ll learn to do: Describe how the theory of evolution by natural selection is supported by evidence

The evidence for evolution is compelling and extensive. Looking at every level of organization in living systems, biologists see the signature of past and present evolution. Darwin dedicated a large portion of his book, On the Origin of Species, to identifying patterns in nature that were consistent with evolution, and since Darwin, our understanding has become clearer and broader.

The video below summarizes the major types of evidence supporting evolution; you will read more details in the pages that follow.