What makes one individual "fitter" than another? Fitness is partly due to having a survival advantage, for example, a beak that allows one bird better access to its neighborhood's food offerings than other birds have. In this program, Exploratorium scientist and educator Karen Kalumuck introduces us to natural selection, and later leads a live-action, full-body competition inspired by it. Four teams of "predators" compete with each other for prey. Who will thrive and who will face extinction? Who's the fittest, and what does that really mean today? Join us to find out!