Comment on The Milky Way is probably full of dead civilizationsparentComments−Panzerschrek10moWe don't need to look hard. If interstellar travel is possible and someone in our Galaxy have developed it in the past, the whole Solar System including Earth should be already colonized.−gizajob10moThere are many other answers to why it isn’t outside of “they should have done this but haven’t and therefore cannot exist”.
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We don't need to look hard. If interstellar travel is possible and someone in our Galaxy have developed it in the past, the whole Solar System including Earth should be already colonized.
There are many other answers to why it isn’t outside of “they should have done this but haven’t and therefore cannot exist”.