Meditações - o tempo não é físico, é cerebral

The sense of time flowing has nothing to do with physics and everything to do with our brain. The past and future, for instance, are purely human constructs; at the microscopic level they are indistinguishable. Time passes at different rates depending on place (moving faster in the mountains and slower at sea level) and motion (a runner ages less quickly than a walker).

Carlo Rovelli, in Seven Brief Lessons on Physics