How does Bluetooth work?

Is Bluetooth actually magic? How does your phone connect to your headphones while both are moving in space? How do multiple Bluetooth connections work and not get confused with multiple devices? These are the questions that CrowdScience listener Rachel was pondering as she cycled home from work with her Bluetooth headphones on.

To find out, presenter Caroline Steel explores the surprising history of wireless technology - featuring a viking king, a 1940s film star, torpedoes from World War 2 and a piano. These days, more than 5 billion Bluetooth-enabled devices are shipped every single year.

Caroline gets herself connected to the science behind the syncing, investigating the physics that allows information to be encoded and beamed between devices. And she pairs with experts who can tell her about brand new innovations, like wireless bluetooth sensors that can harvest energy from the air.