Discussion on question by crass_sandwich: Why would Earth be long-term unsuitable for an advanced alien species that's already colonized it?
Discussion on question by crass_sandwich: Why would Earth be long-term unsuitable for an advanced alien species that's already colonized it?
Imported from a comment discussion on https://worldbuilding.stackexchange.com/questions/161737/why-would-earth-be-long-term-unsuitable-for-an-advanced-alien-species-thats-alr
| first message | 2019-11-28 |
| last message | 1899 days ago |
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