PopSci's Laura Baisas discusses ancient tweezers and screams, Rachel explains leprosy past, present, and future, and Sara Kiley talks about tools and weapons made from space rocks. They delve into the mystery of ancient iron artifacts and explore the use of meteorites in construction. The podcast also addresses the increase in leprosy cases and dispels misconceptions about the disease. Additionally, they uncover Roman tweezers and ancient hair removal practices, discussing cultural reasons and comparing them to modern methods.