Title Text:If you think space elevators are good, but just too boring and practical, check out the ‘space fountain’. Origin:https://xkcd.com/536/ https://www.explainxkcd.com/wiki/index.php/536:_Space_Elevators 太空电梯 https://www.douban.com/photos/photo/738624663/ Arthur C. Clarke是一位科幻作家和未来学家。引用的评论提供了一个基准，指出创建像太空升降机一样庞大和先进的东西需要多长时间：当这个想法达到认真考虑而不是被解雇的程度时，大约五十年的进一步努… Read more