multiplied by age equals
n.b. This is the formula that tells you what speed you are travelling through the Fourth Dimension.
24 hours x 60 years of age = 1,440 lds (Life Day Speed)
24 hours x 13 years of age = 312 lds
Marginal increases in lds are hard to notice year to year, but somewhere in life that awareness of a day’s velocity becomes acute (and a little scary).
Which may explain why thirteen year olds often say “I’m bored.” “Bothered.”, “Whatever.” and ask “What’s the point?” Some of them are not moving quite fast enough yet, so have not a fully developed sense of Life Day Speed.