Although most of africa practiced islam, ethiopia had its own form of christianity known as christianity.

The kind of Christianity practiced in Ethiopia is called  Ethiopian Orthodox Tewahedo Church.

It is one of the Oriental Orthodox Churches, some others are the Coptic Church (in Egypt), the Syriac Church and the Indian Malankara Church. The Oriental Orthodox Churches are autonomous - they are not subordinate to any other Church

Yes you are cute answer theories to explain the colonization of the new world the last great habitable landmass to be occupied by humans focus on the bering land bridge, or beringia, which emerge by siberia and alaska the last ice age.