Why does time seem to speed up with age? (2016)

Maybe it’s related to this phenomenon that when I travel to some new place for the first time then the trip feels much longer than the way back. Also when visiting more and more the trip feels shorter and shorter.

I can imagine that “carving new path into mind” takes more effort than traveling on a path which is already there.

From that, perhaps we can make time seem slower by constantly doing something new instead of falling into old routines. At least falling into routines seems to increase with age.