Four Royal Society Research Fellows delve into a world of extremes. From volcanic eruptions and deep oceans to polar ice caps and the atmospheres of alien planets, the applications of science are allowing us to push the boundaries of what we know and bring the extreme into the everyday. Find out how the pursuit of knowledge leads to bizarre and unknown places, as four Royal Society research fellows discuss what extreme means to them and what that means for science. Speakers Dr Hugh Tuffen Dr Judith Hillier Dr Leigh Fletcher Dr Patricia Sanchez-Baracaldo Chaired by Lewis Dartnell