[mundu_wa_hinya]

This might explain why we see a significant number of birth deformation disabilities in East Africa. Recent migrations (past 0.5k-3k years) might have an impact. For example, it is thought that some parts of East Africa were originally occupied by a pygmy population. They inter married with the migrating Bantu (typically 1.5-1.7m) who also inter married with the Nilotes (Very tall. Masai, Samburu, Luo...). So you now have a descendant population with large variances in height, waist size and so on.