If you're interested in alternate history and have a login for alternatehistory.com, there's an incomplete but moderately good write-up of exactly this. https:

If you're interested in alternate history and have a login for alternatehistory.com, there's an incomplete but moderately good write-up of exactly this. https://www.alternatehistory.com/forum/threads/age-of-near-extinction-articles-from-another-world.481847/ https://www.alternatehistory.com/forum/threads/age-of-near-e...