In this episode of Talk Nerdy, Cara is joined by writer and historian Dr. Lydia Pyne to talk about her new book, “Genuine Fakes: How Phony Things Teach Us About Real Stuff.” Lydia describes the fuzzy line between what’s real and what’s fake, sharing stories about nature documentaries, art forgeries, fossil hoaxes, lab-grown diamonds, and everything in between. Follow Lydia: @LydiaPyne.