It's a bow it existed everywhere in the world except Oceania and Australia. It's been in Africa for up 70k years. Not by bantus but found in southern Africa probably by the Khoisan. Its a worldwide basic weapon.
You're a suugo science merchant wallahi.
Khoisan, is possible, but they don't have metal knowledge or a metal caste in their tribal system. Different for Bantu. Bantu 'sweeped' thru, displaced khoisan, it's quite common knowledge. Only people being displaced are the inferior culture like whites displaced aborigines in Australia, a similar thing happened to those Khoisan. Inferior cultures die, cultures that do not catch up with time either thru isolation geographically or isolation due to 'cultural taboos'.
What 'suugo' science are u talking about? I don't even believe in the science of today world, quoting and memorizing the science week articles is no different to me then some religious person quoting quran and memorizing. Science today is LITERALLY DEAD, that's why you won't find new inventions anymore but just 'tweaks' on old inventions or already established knowledge.
I am not sure what the hell Somali have against Bantu? They are a farming culture, they spread and followed the river systems, there was no war or displacement, why wud africa have 500 languages if there was 'wars'. Africans don't fight each other, they live side by side and move on with life and keep their culture, unless it's obviously very inferior like khoisan and even then they still have their language and culture even tho it's declining rapidly. Europe is reduced to a few languages due to constant 'wars and conquest and cultural displacement', africa has different story or at least needs one to explain why so many language flourishes.
NO1 in Africa besides BANTU was utilizing the 'rivers' for farming, so there should be no hate for them. They populated it, they didn't displace anyone there since NOONE ELSE FARMED IN AFRICA.