Cities aren’t meant to last, according to writer Annalee Newitz. In their book “Four Lost Cities: A Secret History of the Urban Age,” they explore the rise and fall of ancient sites. What can architecture tell us about how we live? What can urban planning tell us about our changing values? And ultimately, why are cities abandoned? Later, we also dive into the story of a scientist who helped us understand the very structure of our DNA. Plus, we get a voice message from actress Sarah Ramos (Parenthood).

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