Acclaimed physician and writer Dr. James Maskalyk speaks about his experience caring for patients all around the world. Trina Boice, an expert on online family history, offers the best tips on finding information about your ancestors. Rachel Plotnick explains the mechanics and psychology of buttons. Finally, we talk with Sandra Rey, the founder of a company dedicated to harnessing the power of bioluminescence to light our world.? (Originally aired February 28, 2019)