Our new show, Horizons, dives into the science, health, technology and environmental issues making headlines each week. Host William Brangham explores these topics through in-depth discussions with leading experts and professionals. In our inaugural episode, Brangham speaks with three professionals about the intersection of food and health in the U.S., the Make America Healthy Again movement and updates to the federal nutrition guidelines. Ashley Gearhardt is a professor of psychology and clinic

These Creatures Were Darwin's Greatest Enemy | Eons • PBS