Howard Hughes Medical Institute
Got Lactase? The Co-Evolution of Genes and Culture
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...
National Center for Case Study Teaching in Science
Breast Cancer Risk
How does one determine whether or not someone is at risk for breast cancer? Find out through a comprehensive case study involving two readings and a group activity in which learners assess four women's potential for acquiring the...