Ever wonder where hormones like testosterone or estrogen first came from? Thanks to African American chemist, Percy L Julian, mass production of these chemicals happened in the 1950s and 1960s. Julian himself fought tirelessly for his work throughout the racist eras of his childhood and adult life, facing lynching, discrimination, rejection, and even firebombing. Listen to the investigation of Julian's life, and why he should be given more credit in American history for his work.