This time we are focussing on the world of sensor technology that allows us to collect information at an atomic level. Improvements in quantum sensors are changing how we can detect all sorts of tiny changes in the world around us, revolutionising medical diagnostics, resource extraction and even letting us see around corners… Britain's first astronaut, Helen Sharman, is joined by Professor Sir Peter Knight. Sir Peter is an internationally renowned academic in the field of quantum optics and has received numerous awards throughout his career, including the Royal Medal from the Royal Society.