Inspiring the scientists of the future is something that MedImmune, the global biologics research and development arm of AstraZeneca, takes very seriously. Therefore the Society of Biology’s ‘Big Biology Day’ – a one day, free-to-attend event aimed at engaging the public in scientific issues and research activities – has become a permanent fixture in MedImmune’s calendar. This year’s event, which took place on Saturday 18th October at Hills Road Sixth Form College, was attended by over 1,000 people of all ages and was the third Big Biology Day to be held in Cambridge. As usual, it formed part of National Biology Week, the Society of Biology’s annual celebration of the biosciences and was held in collaboration with the University of Cambridge Science Festival.