Technology has a history almost as old as humankind. When humans first lived in Africa, they began creating tools made of stone, which started the chain of events that led to the invention of the screen you are reading these words on today.
Yet new evidence shows instead of a single group of people coming up with these tools, there were groups of humans living across Africa. The groups were kept separate by forests, rivers and deserts, and while they could not communicate with each other, they were separately inventing their own tools.
Read more on Wired UK