Hormones contribute a lot to our lives – from controlling our metabolisms and emotions to guiding the survival of the species. And yet scientists are still learning about these curious chemicals. Dr. Randi Hutter Epstein joins guest host Courtney Collins to talk about the vital role these curious chemicals play in our existence. Her new book is called “Aroused: The History of Hormones and How They Control Just About Everything” (W.W. Norton and Co).