There's no denying political polarization is a major concern across the U.S. But researchers at Stanford University are taking steps to address the root causes through an experiment called the "Strengthening Democracy Study." The study comprised 31,000 participants and tested 25 strategies to reduce polarization and anti-democratic attitudes. Robb Willer, director of the Polarization and Social Change Lab at Stanford joins us. And, as the effects of climate change weather on, ancient artifacts and, in some cases, full civilizations are revealing themselves. Dinosaur footprints turned up in Texas after a severe drought and World War II ships were exposed in the receding waters in Serbia, to name a few. Archaeologist and Egyptologist Sarah Parcak joins us.