Variation, Selection, and Time
Scroll through the page below to get an idea of the immensity of geologic time.
Genetic Science Learning Center. (2013, July 1) Geologic Time. Retrieved May 18, 2017, from http://learn.genetics.utah.edu/content/selection/time/
Geologic Time [Internet]. Salt Lake City (UT): Genetic Science Learning Center; 2013 [cited 2017 May 18] Available from http://learn.genetics.utah.edu/content/selection/time/
Genetic Science Learning Center. "Geologic Time." Learn.Genetics.July 1, 2013. Accessed May 18, 2017. http://learn.genetics.utah.edu/content/selection/time/.