Middle age

Middle age was the stage of life in which one had lived half their average life span. A suddenly realization of having reached that age could produce a midlife crisis. 
In 2370, Data detected the life signs of, among others, two middle aged males on Camor V. ()
In 2371, Julian Bashir noted to Elim Garak that "in many Human cultures, the thirtieth birthday is considered a sort of landmark. It marks the end of youth and the beginning of the slow march into middle age." ()
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Category:Biology 
Category:Social sciences