To physicists who daily contemplate extra dimensions and time travel, being given the chance to attend the same conference twice may not seem strange.
Simply by crossing the divide between dark and light blue, experts can go from this week's International Conference on String Phenomenology at Oxford University to next week's Strings 2002 at Cambridge University.
Both will attract the world's leading experts to discuss the latest advances in the field.
Just to underline the multi-dimensional nature of the two events, Michael Green, professor of theoretical physics at Cambridge, and Philip Candelas, professor of mathematics at Oxford are on the scientific advisory committees of both.