Modern Chinese and international research using new methods like drones systematModern Chinese and international research using new methods like drones systematically studies the Great wall of China. Its visibility from space is a legend, but its size actually ranks as world's largest monument. It never was a single wall, but a system of several segments, repeatedly altered over time, in successive attempts to prevent invasions from raider tribes, like the Xiongnu, adapted to the terrain, with an elaborate system of garrison towers, advanced tower posts and communication system. Building and manning it proved extremely costly. It failed to prevent the Mongol armies of Genghis Khan annexing China, his great successor Kublai Khan built a wall system to fit his larger empire. After the Ming dynasty finally expelled the Mongols, the 'primitive' walls were replaced by the final stone version, using a brick type solidified with rice starch. While the unprecedented mobilization of means for construction and garrisons crippled the treasury, it proved useless against the ...详情
主演:瑞安·巴雷托,斯戴芬·莫昌特,克里斯托弗·沃肯,达伦·博伊德,杰西卡·古宁,埃莉诺·汤姆林森,查尔斯·巴巴洛拉,伊恩·麦克尔希尼,妮娜·瓦迪娅,多莉·韦尔斯,克莱斯·邦,格雷斯·卡尔德,迈克尔·科克伦,詹姆斯·尼尔森-乔伊斯,Chloe Partridge,罗莎·罗布森,Joanna van Kampen