Africa's History did not start in Slavery.Some of the world's other great civilisations, such as Kush, Axum , Ghana , Mali , Oyo empire and Great Zimbabwe , also flourished in Africa and some major scientific advances were known in Africa long before they were known in Europe . Towards the middle of the 12 th century, the north African scientist, Al Idrisi, wrote, ‘What results from the opinion of philosophers, learned men and those skilled in observation of the heavenly bodies, is that the world is as round as a sphere, of which the waters are adherent and maintained upon its surface by natural equilibrium.'
