人是一个行走的存在，总是向前，寻找自己的命运。

Reality is a question of perspective; the further you get from the past, the more concrete and plausible it seems—but as you approach the present, it inevitably seems more and more incredible.

人类的一代代后代，将取得令我们惊讶的成就，然而如果我们有想象力，未来的他们将会创造的一部分东西，已经可以用今天现有的材料和工具来制造。展开畅想吧。