Why cutting down a precious tree species brought the Nasca people to their knees, how Pompeii is receiving a makeover, a new source of Neanderthal flints unlocks the secrets of early inhabitants of Britain and a Peruvian irrigation system that can make your eyes water. Plus home-grown archaeology with the back-yard archaeologist Tom Birch who goes out on location with Time Team's Carenza Lewis. Like this podcast? Please help us by supporting the Naked Scientists