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Why do we go through puberty?
Question Date: 2014-08-19
Answer 1:

Puberty is the period of the development of organs used in reproduction, the transition from a juvenile life to adult life. All multicellular organisms, animals and plants alike, do it, although in some the changes are more obvious than others.

Organisms that are too young may not be able to allot the nutrients and energy to reproduce, so don't do it until they reach a certain age or size.

In humans, puberty also causes a number of other changes that are not related to reproduction, the growth of body hair being an example. Why this happens I don't think anybody knows, but it may have to do with something called sexual selection (choosing of mates). It also may have been something that was important to our ancestors, but no longer matters for modern humans, and remains as an evolutionary relic.

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