Johnny Mack shares five uplifting stories, starting with research showing hourly five-minute walks boost office worker happiness and productivity. Scientists discovered Antarctic sea squirt toxins that kill melanoma cells in mice without harming them. Montana volunteers reward designated drivers with coffee gift cards to discourage drunk driving. Kelsey made history as the first American woman to row solo from California to Hawaii, setting a new speed record. The episode concludes with a lighthearted anecdote about a vibrating suitcase containing an electric toothbrush.