Name

Biography Christopher Ryan, Ph.D., is an American author and psychologist known for his work in human sexuality and evolutionary biology. He earned his doctorate in psychology from Saybrook University, focusing on the prehistoric roots of human sexual behavior. Ryan has contributed to various platforms, including a TED talk titled "Are We Designed to Be Sexual Omnivores?" He also hosts the podcast "Tangentially Speaking." Cacilda Jethá, M.D., is a physician and psychiatrist with a background in cross-cultural medicine. Together, they co-authored "Sex at Dawn," combining their expertise to explore the complexities of human sexual evolution.