Martin Rees, Lord Rees of Ludlow OM FRS, is the UK’s Astronomer Royal. He is based at Cambridge University where he is a Fellow (and former Master) of Trinity College. He is a former President of the Royal Society and a member of many foreign academies. His research interests include space exploration, high energy astrophysics, and cosmology. He is co-founder of the Centre for the Study of Existential Risk at Cambridge University (CSER), and has served on many bodies connected with education, space research, arms control, and international collaboration in science. In addition to his research publications he has written many general articles and ten books, including most recently On the Future: Prospects for Humanity.