Marlene Zuk is Regents Professor of Ecology, Evolution, and Behavior at the University of Minnesota and a member of the National Academy of Sciences. She has written for The New York Times, the Los Angeles Times, and New Scientist. Her books include Dancing Cockatoos and the Dead Man Test: How Behavior Evolves and Why It Matters and Paleofantasy: What Evolution Really Tells Us About Sex, Diet, and How We Live.