"just like my skull and those of everyone else who lives in Ethiopia?"
When did you move to Ethiopia? And when did their skulls have different numbers of bones than everybody else?
I live in the United States, and I assume my cranium is comprised of eight bones. I also assume your cranium has the same number. Also the craniums of all the people who live in Ethiopia. Also the cranium of this supposed "missing link" that has tools strewn about its proximity.