Shining a light on the invisible forces that surround us, this episode is all about the unseen world. Normally we don’t notice bats flitting above our heads at night, and we certainly can’t hear their ultrasonic squeaks. But the team listens to three...

This episode celebrates some of the world’s most important sites for the discovery of elements. A quarry in the village of Ytterby in Sweden is first up, where almost 10% of naturally occurring elements have been discovered. The team then takes a trip...

Making sense of the many weird and wonderful interactions that inform our view of the world, this episode is all about perception. The team opens with the incredible noise of a binaural sound, to illustrate the subtle complexity of the way we hear the...