撒哈拉沙漠是世界上最大的沙漠,气候炎热干燥。然而,在这极端干燥缺水、土地龟裂、植物稀少的空旷之地,曾经有过高度繁荣的远古文明——沙漠上许多绮丽多姿的远古大型壁画就是明证。据考证,撒哈拉沙漠曾经是一片绿色的平原,古老的非洲居民在这片绿洲上创造了灿烂的文化。那么,是什么原因使当年的绿洲变成了“穷荒绝漠鸟不飞,万碛千山梦犹懒”的 The Sahara Desert is the largest desert in the world with hot and dry climate. However, in this extremely dry and water-scarce, land-cracked and sparsely populated open space, there was once a highly prosperous ancient civilization, as evidenced by the many beautiful and ancient large murals in the desert. According to research, the Sahara desert was once a green plains, the ancient inhabitants of Africa in this oasis to create a brilliant culture. So, what is the reason that the oasis of the year turned into a “poor and destitute birds do not fly, thousands of mountains Qianshan dream lazy”