The biological evolution of sex in our planetary ecosystem is a complex story covering millions of species and billions of years. The human species further complicates this story with the bio-cultural evolution of sex and gender in complex social niches. Religion and spirituality have played important roles in this process, both influencing and being influenced by sex and gender differences. This project employs perspectives from biological and cultural evolution, developmental biology, anthropology, sociology, psychology, social construction, cognitive neuroscience, neuroimaging, and ethics to understand the intricate multi-directional influences among sex, gender, religion, and spirituality. Watch this video to find out what's happening.