Time, its passing, its measurement and its experience is fundamental to our understanding of existence with regards to both the cosmos and the cognition possessed by our species. Without it, change, order, duration and concepts such as “beginning” and “end” would not be possible to conceive of let alone value. However What is time? And how does it exist? Welcome to the bizarre world of time where philosophers and physicists comprehend time in a way that is almost completely divorced from our everyday intuitions of time. According to Einstein’s Theory of Relativity there is no universal simultaneity; all time is relative and thus the past, present and future may all already be existing at once. Others perceive time as an illusion; and when we get down to the quantum level things rarely function with any more clarity
Joshua Norton is Professor of philosophy of physics at The American University of Beirut. He specialises in the ontology of identical particle systems in quantum mechanics and their relation to Leibniz’s principle of the identity of indiscernibles, the ontology of loops in loop quantum gravity; and the nature of spacetime in general relativity and newly developing theories of gravity.