Jeeva Anandan, Max-Planck-Institut für Physik Föhringer Ring 6, D-80805 Munich, Germany and Department of Physics and Astronomy, University of South Carolina, Columbia, SC 20208, USA Abhay Ashtekar, The Center for Gravitational Physics and Geometry, The Physics Department, Penn State University, University Park, PA 16802-6300, USA Sir Michael Atiyah, The Master's Lodge, Trinity College, Cambridge, CB2 1TQ Toby Bailey, Department of Mathematics, University of Edinburgh, James Clerk Maxwell Building, The King's Buildings, Mayfield Road, Edinburgh EH9 3JZ Dorje C Brady, Blackett Laboratory, Imperial College, South Kensington, London SW7 2BZ Brandon Carter,Department d'Astrophysique Relativiste et de Cosmologie, Observatoire de Paris, Place J Janssen, F-92195 Meudon Cedex, France Alain Connes, Department of Mathematics, Collège de France, 11 Place Marcellin Berthelet, 75005 Paris Cedex 05, France Simon Donaldson, Mathematical Institute, 24 - 29 St Giles', Oxford, OX1 3LB Artur Ekert, The Clarendon Laboratory, Parks Road, Oxford, OX1 3PU Helmut Friedrich, The Albert Einstein Institute, The Max-Planck-Institute für Gravitationaphysik, Schlaatzweg 1, D-14473 Potsdam, Germany Simonetta Frittelli, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA Gary Gibbons, Department of Mathematics and Theoretical Physics, University of Cambridge, Silver Street, Cambridge, CB3 9EW Simon Gindikin, Department of Mathematics, Rutgers University, New Brunswick, NJ 08903, USA Stuart Hameroff, Department of Anaesthesiology, University of Arizona, Tucson AZ 8572, USA Stephen Hawking, Department of Mathematics and Theoretical Physics, University of Cambridge, Silver Street, Cambridge, CB3 9EW Nigel Hitchin, Department of Pure Mathematics and Mathematical Statistics, University of Cambridge, 16 Mill Lane, Cambridge CB2 1SB Andrew Hodges , Wadham College, Oxford, OX1 3BN Richard Josza, School of Mathematics and Statistics, University of Plymouth, Plymouth, PL4 8AA Lane Hughston, Merrill Lynch International, 25 Ropemaker Street, London, EC2Y 9LY Louis Kauffman, Department of Mathematics, Statistics, and Computer Science, University of Illinois at Chicago, 851 South Morgan Street, Chicago, Illinois 60607-7045, USA Carlos Kozameh, FaMAF, Universidad Nacional de Córdoba, 5000 Córdoba, Argentina Claude Lebrun, Department of Mathematics, State University of New York at Stonybrook, Stonybrook, NY 11794, USA Sergei Merkulov, Department of Mathematics, University of Glasgow, G12 8QW Ted Newman, The Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA Sir Roger Penrose, Mathematical Institute, 24 - 29 St Giles', OXFORD, OX1 3LB L J Schwachhöfer, Universität Leipzig Dennis Sciama, SISSA/ISAS, Via Beirut 2-4, 34013 Trieste, Italy Graeme Segal, Department of Pure Mathematics and Mathematical Statistics, University of Cambridge, 16 Mill Lane, Cambridge, CB2 1SB Abner Shimony, Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA 02215 , USA Lee Smolin, The Center for Geometry and Gravity, The Physics Department, Penn State University, University Park, PA 16802-6300, USA George Sparling, The Department of Mathematics and Statistics, University of Pittsburgh, Pittsburgh , PA 15260, USA Paul Steinhardt, Department of Physics and Astronomy, David Rittenhouse Laboratory, University of Pennsylvania, Philadelphia, PA 19104-6396, USA R P Thomas, The Mathematical Institute, 24 - 29 St Giles', Oxford, OX1 3LB Andrzej Trautman, Instytut Fizyki Teoretycznej, Uniwersytet Warszawski, ul Hoza 69, PL-00681 Warszawa, Poland Lev Vaidman, School of Physics and Astronomy, Raymond and Beverly Sackler, Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel Gabriele Veneziano, Theory Division, CERN, Geneva, Switzerland Richard Ward, Department of Mathematical Sciences, University of Durham, Durham, DH1 3LE John A Wheeler, Department of Physics, Princeton University, Princeton, New Jersey, USA