Age groups

[Eilonnwy]

It occured to me recently how we always know our age because our age matters so much in almost evertyhing we do from school, to work, to getting into clubs (whee!). I wondered if we didn't have to care about our age, would we keep track of it. Did early humans try to keep track of age before dates became established? And more interestingly, would life feel longer or shorter if we stopped keeping tabs on how many years we have lived? Sometimes I think too much on my way to work.