Based at Cambridge University; national role as Astronomer Royal. Member, House of Lords. Many visiting professorships. Trustee, Institute for Advanced Study, Princeton. Member: US National Academy of Sciences; Russian Academy of Sciences; Pontifical Academy; other national academies. Former President, Royal Society. Apart from scientific publications, has written eight books including Before the Beginning, Just Six Numbers, Our Final Century, From Here to Infinity. Recipient: Balzan International Prize; Crafoord Prize; Templeton Prize. Expertise: practical and philosophical implications of scientific discovery, especially long-term risks and prospects.