Why are pygmies short

There are a number of theories to explain why pygmies are so short. It has been proved that their height is hereditary, and is passed on from parents to children. It may have evolved because of the low ultraviolet light found in rainforests, where many pygmies live. This would mean that the pygmies would make less vitamin D in their skin.

pygmies' small stature to minimizing caloric requirements and walking in dense forests. ... For example, many human populations live in dense forests and experience regular food shortages, and yet these populations have larger body sizes.

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