Timeline for Why would Earth be long-term unsuitable for an advanced alien species that's already colonized it?
Current License: CC BY-SA 4.0
1 event
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 25, 2019 at 23:39 | history | answered | McTroopers | CC BY-SA 4.0 |