Middle Ages: Africa
Three main contributions from ancient African society were that they had built the pyramids in ancient Egypt. These structures were very well built and most of them are still standing today. Another main contribution from African society was finding out about the sundial clock. This was very important for telling what time it was. It works by telling the position of the sun. The final great contribution from ancient African society was that they figured out about the astrolabe to measure Earths distance. As you can see the ancient Africans made lots of great contributions that we still use today.