natural selection

Pronghorn are unusual because their twins are the only surviving winners in some pretty serious battles within the womb. Soon after fertilization, there…

08/07/2015 - In this episode, a question that haunted Charles Darwin: if natural selection boils down to survival of the fittest, how do you explain why…

12/21/2013 - In this episode, a question that haunted Charles Darwin: if natural selection boils down to survival of the fittest, how do you explain why…