we opened this type of discussion on ventrilo with John if I'm not mistaking, at least about aging and feeling old. well we didn't talk about it for much more than 5 minutes, because conclusion was made quite fast.
So when you're young <12, it feels that you have infinite time, years just won't pass by, you just aren't getting any older and you're always amazed by grown ups statement "time sure does fly".
so what's going on is, you're learning so many new things that you don't pay much attention on time, off course most of it is only "feeling" but still, this can be projected onto an older person i would say. Basically, the more you make out of your time, the more you have at your disposal, which we already know but apparently it has much to do with our perception of time!
Beekeeping has another effect i would suspect, apart from dealing many issues i would say that the main attribute is the fact that it's cyclic and it also messes up your perception of time, in a good way off course. a year in a persons life is not "much", but as a beekeeper you also live a life of a bee and so, a year becomes very long.
off course my explanations are not much physically based but nor is human brain only physical.