When it comes to biological sex, humans are pretty vanilla. Things are so much wilder in nature. Philosopher of science Paul Griffiths challenges the notion that our biological sex is a rigid, unchangeable thing. Political philosopher Luara Ferracioli contemplates the controversial idea of artificial wombs replacing women’s wombs, with babies gestated entirely outside of the human body. What could that mean for the future of parenthood, motherhood, and our relationship to children? They join Natasha Mitchell for a Big Ideas on sex, biology, and baby making.