Assistant Professor of Biology Lars Schmitz comments on the evolutionary behavior of early mammals in a . The article highlights research in the evolutionary biology field that hoes in on not only the numbers and types of mammals that expanded rapidly when dinosaurs went extinct, but the type of behavior that emerged the importance of various types of data to improve science’s understanding of the clues provided by evolution’s history. Schmitz is an evolutionary biologist of Claremont McKenna, Pitzer, and Scripps Colleges at the W.M. Keck Science Center.