“…many, many separate arguments, all very strong individually, suggest that the very notion of space-time is not a fundamental one. Space-time is doomed. There is no such thing as space-time, fundamentally in the actual, underlying description of the laws of physics.
That’s very startling, because for what physics is supposed to be about is describing things as they happen in space and time. So if there is no space-time, it’s not clear what physics is about. That’s why this is a hard problem. That’s a serious comment…”
                                                                                                                                                                                Nima Arkani-Hamed (Theoretical Physicist Princeton)