Thanks to NASA's Juno mission, scientists are starting to peel back the layers of Jupiter to reveal the wonders within. Professor Kaitlin Kratter reveals how extreme the planet is, with the aid of a quarry and a few rocks, giving some idea of the size of the second largest body in the solar system. And at the National Ignition facility in Northern California, Dr Marius Millot uses powerful lasers normally used for nuclear fusion for an experiment giving an idea of the pressures inside Jupiter. Narrated by Toby Jones.