Add Yahoo as a preferred source to see more of our stories on Google. (Blend Images - Peathegee Inc/Tetra Images/Getty Images) Evolutionary theory has revolutionized the way we understand humans – yet ...

The cellular biology of reproduction is often depicted as an epic journey, in which millions of intrepid sperm fight to be the first to claim the ultimate prize: the chance to fertilize the egg, which ...

Guest: Cat Bohannon is a researcher and theorist specializing in the evolution of narrative and cognition. She is the author of Eve: How the Female Body Drove 200 Million Years of Human Evolution.