The Black Death killed millions of millions of people which lowered the population
They were all used in china before being used in Europe.
The best explanation for how humans populated the Earth is that "they migrated
<span>mostly over land from Africa over the last eighty thousand years" since all human life originated in Africa. </span>
Use the picture I gave you and there is one on there look up the question and they have hem on google. I hope this helped thank you.