How did the beginnings of genetic research influence the Nazi party? A thorough, engaging unit incorporates the work of Gregor Mendel, the study of inherited traits, and the use of racism and discrimination during the Holocaust.

Does the human body evolve as quickly as human culture? With a stellar 15-minute video, explore the trait of lactose intolerance. Only about 1/3 of human adults seem to still have the enzyme lactase and therefore, the ability to digest...