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> If they would, then why aren't they already here? Space is really really big and there are a lot of star systems. Maybe it's just statistics. > Plenty to c
by ForHackernews 8y ago
> If they would, then why aren't they already here?
Space is really really big and there are a lot of star systems. Maybe it's just statistics.
> Plenty to colonise the galaxy,
I think you're seriously underestimating how big a galaxy is: https://www.reddit.com/r/theydidthemath/comments/2i6le7/request_how_many_individual_pieces_of_saltsand_is/ https://www.reddit.com/r/theydidthemath/comments/2i6le7/requ...
- mcv 8y agoI know how big the galaxy is, but I also know how much a billion years is, and how fast exponential growth grows. Of course a civilisation won't be able to keep growing exponentially for ever; pretty soon only the outer rim will have anything nearby to colonise. But still, a billion years is a lot. But if colonies don't grow up to colonise other planets, you're stuck with linear growth, which is never going to be enough.