如果我们能够在火星上自给自足,就代表着人类已经通过了宇宙大筛选的条件之一,届时我们将成为星际公民。
地球迄今约有45亿年历史,但人类尚未成为跨星球生存物种,也不确定留给我们的时间还有多久。

If we are able to make life self-sustaining on Mars, we will have passed one of the greatest filters. That then sets us up to become interstellar. Earth is ~4.5B years old, but life is still not multiplanetary and it is extremely uncertain how much time is left to become so.
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