This answer would be false, a simple google search should be sufficient for confirmation on my answer, good luck!
Mammals first appeared during the <span>Mesozoic </span>era.Hope I helped, good luck!'
They really help in the process of Africa's state building, creating commercial networks between parts of the continent, and introducing literacy ( especially on northern part of Africa)
They also controlled the sea route between Asia and Africa and managed to maintain the relationship between Africa and the middle east