6,000 years ago, the Sumerians who lived in Mesopotamia used barley malt to make the original beer, but the beer at that time was not rich in foam. About 3,000 BC, the Semitic people in Persia learned to make beer, and they also carved the method of making beer on the board and dedicated it to the goddess of farming. In 2225 BC, beer was popular among the Babylonians in Cuba, and they used beer to entertain guests. At that time, the ancient Egyptians and the Babylonians noticed the medicinal value of beer, and they used beer to make drugs. The Greeks also loved to drink beer, and they learned how to make beer from the Egyptians. Beer is the oldest alcoholic drink in humans and the third-best drink in the world after water and tea. Beer is a low-alcoholic wine containing carbon dioxide, which is made from barley malt, hops and water, and fermented by yeast.