I am a biologist, a worker in a field with a sorrowful history of categorizing human beings by race, arranging them in a false hierarchy.
Neutral evolution means mutations are occurring all the time, and most of the time they are neutral, or nearly neutral.
Just for a little while turn off the PBS science narrator in your head. Why should there be beauty? What is it for?
I bring this up because some have claimed that I advocate a sole genetic progenitorship model for the first couple.
New research confirms the possibility of a starting point of two humans instead of thousands. Ann Gauger reports.