In this episode of Talk Nerdy, Cara is joined by evolutionary biologist and geneticist Dr. Joseph L. Graves Jr. to talk about his new book, "A Voice in the Wilderness: A Pioneering Biologist Explains How Evolution Can Help Us Solve Our Biggest Problems." They discuss his incredible career, beginning as the first African American to earn a PhD in evolutionary biology, and continuing in the fight against racial and gender inequity in the sciences and society at large. Follow Joseph: @gravesjl55.