换句话说，它提出了时间旅行的前景。
对于某些人，它可能只是种幻想，但换句话说，几十年前，太空旅行不也是被认为是科幻小说吗。
It might be kind of fanciful to some, but on the other hand, space travel was considered science fiction not that many decades ago.
换句话说，新人种从一条现在看起来平淡无奇的路线从非洲到了世界其他地方，他是古人类旅行史上的第四个例子。
It is, in other words, a fourth example of anthropological tourism from Africa to the rest of the world, on what is now looking like a well-worn route.
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