ago, followed by a split of the Pygmies' ancestors into the Western and Eastern pygmy groups 20,000 years ago."

New evidence suggests East and West African Pygmy children have different growth patterns. The difference between the two groups may indicate the Pygmies' short stature did not start with their common ancestor but instead evolved independently in adapting to similar environments, which adds support that some sets of genes related to height were advantageous in Eastern Pygmy populations, but not in Western Pygmy populations.

However,

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