The Agenda in the Summer welcomes science journalist Britt Wray to discuss "Rise of the Necrofauna: The Science, Ethics and Risks of De-Extinction," her book about how advancements in genetic science mean it might be possible to bring back extinct animals through various kinds of selective breeding, cloning, and genome engineering.

Kate Harris always knew she wanted to travel from small-town Ontario to Mars. Along the way, she ended up on an epic journey on the fabled Silk Road. She talks to Nam Kiwanuka about that adventure, the topic of her book, "Lands of Lost Borders: Out of Bounds on the Silk Road."