nostr:npub1708609lmn43zrawglw7yzv0t3h43a88smnzjhgyva6asp2t99qxq2tl57w this is the relavent branch of a large eurasian continuity of orangutans similar to what is still had with macaques, groups of prinates likely migrate into africa and sometims Indonesia and become occasionally isolated, this explains the many distinctive african varieties relative to eurasia. probosicus monkies reflect a similar conservative isolated population to orangutans.
gorillas migrated and became trapped in east africa after tgey had lost their hair, chimpanzees did so after they had lost their extensive size, either around 4 million years ago or 18 million years ago with repeated back migrations. i assume the primary human population is in india or maybe afhganistan.
its possible populations in africa are being driven their after having developed hyper aggression, rather than develooing this in africa