During puberty boys experience anatomical changes that don't seem to have any practical purpose. Scientists know that hormone levels fluctuate to produce a more muscular physique and genital development. But why other changes occur, ...See moreDuring puberty boys experience anatomical changes that don't seem to have any practical purpose. Scientists know that hormone levels fluctuate to produce a more muscular physique and genital development. But why other changes occur, presumably related to hormone fluctuations, isn't well understood. Written by
David Foss
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