The second tab is all about contributions and achievements of Asia in the middle ages. One of their achievements was the astrolabe. Muslim scientists used the astrolabe (a navigation tool) to determine the distance around the world. Based on this they concluded that Earth was round. Another one of their contributions was that they were cockered the founders of chemistry. They were considered this because they were the first people to experiment with many different types of metal. Lastly the Asians were very important traders. They exported and imported many items such as rubies, oranges, rice, cloth, spices, and carpets.