Physicist Dr Helen Czerski takes us on an amazing journey into the science of bubbles. Bubbles may seem to be just fun toys, but they are also powerful tools that push back the boundaries of science. The soap bubble with its delicate, fragile skin tells us about how nature works on scales as large as a solar system and as small as a single wavelength of light. Then there are underwater bubbles, which matter because they are part of how the planet works. Out at sea, breaking waves generate huge plumes of bubbles which help the oceans breathe.