Michael Hall, PhD, received PhD from the Australian National University in 1989. Since then he has worked in various areas of the foundations of physics, from both inside and outside academia (including a year as a Humboldt Fellow in Ulm, and sixteen as a patent examiner). For the last six years he has been a research fellow in the Centre for Quantum Dynamics at Griffith University in Brisbane and has recently taken up a visiting fellowship at the Australian National University in Canberra. Dr. Hall's research interests include quantum optics and information, time observables, quantum locality, relativistic Hamiltonians, the consistent coupling of classical spacetime to quantum matter, and the many-interacting-worlds approach to quantum mechanics. He is a member of the editorial boards of the Journal of Physics A and Physical Review A.