There's a most unusual gym in ecologist Sonia Altizer's lab at the University of Georgia in Athens. The athletes are monarch butterflies, and their workouts are carefully monitored to determine how parasites impact their flight...

WNYC and the Apollo Theater present the 12th Annual Dr. Martin Luther King, Jr. Day Celebration, exploring the progress that has been made in the half-century since Dr. King’s untimely death. #WNYCMLK #ApolloUptownHall