While chatting at the back of class, best mates Abi and Sofia got curious about bubbles. How do you make really giant ones? Could you even get one around the entire planet?

Hannah and Dara set out to investigate. They hear from a renowned 'bubbleologist', and learn how NASA helped him blow his way to a world record. They coax a physicist to reveal the secrets of his peer-reviewed bubble-juice formula, and investigate how bubbles work in space and in the ocean.

Our curious duo also discover an audacious project aiming to build a Brazil-sized raft of bubbles... in space!

Contributors:

Dr Helen Czerski, UCLDr Justin Burton, Emory UniversityDr Awesome, BubbleologistProfessor Carlo Ratti, MIT

Producer: Ilan GoodmanExecutive Producer: Alexandra FeachemA BBC Studios Audio Production