Martin Rees has been Master of Trinity College, Cambridge since 2004. In his earlier career he held short-term posts in the UK and the USA, before becoming a professor at Sussex University, and subsequently Professor and Director of the Institute of Astronomy at Cambridge. He is the author or co-author of more than 500 research papers, seven books, and has written and broadcast extensively. He has held visiting posts at numerous universities abroad, received numerous awards, and served on many bodies relating to international science. He is a foreign associate of the US National Academy of Sciences, the Russian Academy of Sciences and several other foreign academies, and has served as Trustee of the British Museum, IPPR, and the Princeton Institute for Advanced Study. He was President of the Royal Society from 2005 to 2010, and in 2005 he was appointed to the House of Lords.