Imagine laying a sheet of smart film on a masterpiece like "Starry Starry Night". Without contaminating the surface, you can lift off chemical signatures. Discover what paint Van Gogh\xa0used, what drugs he might have been taking and even if he was suffering from a recognisable disease. Dr Alice has the story plus\xa0Dr Karl on the growing rubbish dump above our heads and (almost) Dr Jessica on those one-off intergalactic tweets called FRBs - what are they ?\xa0