Radio 4 Broadcast June 2016 - Five episodes.
Producer: Max O'Brien
A Juniper production for BBC Radio 4.
Science writer and broadcaster Philip Ball sets out on a quest to explore the peculiar world of the invisible, a mysterious realm where magic and science meet.
Episode One - Invisible Forces
Episode Two - Conjuring the Invisible
Episode Three - The Spirit World
Episode Four - The Invisibly Small
Episode Five - Becoming Invisible