Iceberg as big as London and why do we get wrinkly fingers in water?

A huge iceberg the size of London recently broke off from the Larsen C ice shelf in Antarctica – and it’s exposed a massive seabed that’s been hidden beneath the ice for up to 120,000 years! Dr Katrin Linse is leading a mission next year to explore this undiscovered part of our planet and she joins Dan on the phone to explain what her and her team will be looking for whilst they're out there.

Plus, we discover why chemistry was crucial to prehistoric cave art, hear about why our fingers and toes go wrinkly in water and find out about the deadly 'Substance N'.