This episode is for anybody interested in how human beings have altered the world around us since we came on the scene tens of thousands of years ago. University of California Santa Cruz evolutionary biologist Beth Shapiro weaves fascinating and fun personal anecdotes from her own life and research on ancient DNA to tell the story of the evolution of Earth and the life-forms it hosts. Shapiro also delves into the risks and opportunities presented by powerful new synthetic biology technologies. She is not afraid to voice her own opinions on topics that can be quite controversial – like gene editing, cloning and the consequences of climate change – and speaks candidly in this podcast.