Whales, sex and rocks — it's our book show!

We revisit our conversations with authors of some of the year’s most fascinating science books in our annual holiday book show. Featuring: Questioning the purpose of whale song — for love or echolocation?Journeying through deep geological time to better tackle problems of the futureBiological sex is complicated, but that's what helps animals like humans thrive Plus, science journalist and BookLab podcast co-host Dan Falk reviews The Martians by David Baron, Dinner With King Tut by Sam Kean and The Mind Electric by Pria Anand.