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Hello OA!
#18
(02-11-2020, 01:07 AM)Jargal Wrote: Speaking about xenoarcheology. Universe is old, xenosophonts are rare, this I understand. But youngest xenos remains in OA, as I've found, are tens of millions years old. Is there some principial rule that no extinct xeno civilization can be found, ceased to exist only hundreds of thousands/1-2 millions of years ago? If we talk about Low-tech (maybe up to Middle-tech) society, after just a million of years even on our single planet finds happen only by chance. Not very archeologically friendly situation :-)

Meant to respond to this sooner -

No, there isn't really any forma policy that xenosophont remains be tens of millions of years old or older. It's just kind of shaken out that way. I suspect it is somewhat a byproduct of our own interpretation of the universe being very big and very old.

That said, there are a few extinct species that vanished/died out less than 10 million years ago:

Unnamed species: HIE072CZE - Species which withdrew from the Orion Arm 5.4 million years ago.

Thyresta - Destroyed themselves in a nuclear war 3.6 million years ago.

Iahi Daon - Went extinct around 7 million years ago.

One thing that might help from an archeological standpoint is that the remains of most of these civilizations are likely found as artifacts in space - an environment which is probably very good at preserving many things for a very long time. No weather, no animals or plants, no climate or geological shifts to destroy things.

Todd
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Messages In This Thread
Hello OA! - by Jargal - 02-10-2020, 08:28 PM
RE: Hello OA! - by MacGregor - 02-10-2020, 10:13 PM
RE: Hello OA! - by Drashner1 - 02-11-2020, 12:00 AM
RE: Hello OA! - by Jargal - 02-11-2020, 06:50 PM
RE: Hello OA! - by Jargal - 02-11-2020, 01:07 AM
RE: Hello OA! - by Drashner1 - 02-12-2020, 02:28 PM
RE: Hello OA! - by Jargal - 02-12-2020, 06:57 PM
RE: Hello OA! - by Drashner1 - 02-13-2020, 12:39 PM
RE: Hello OA! - by Rynn - 02-11-2020, 02:17 AM
RE: Hello OA! - by stevebowers - 02-11-2020, 03:34 AM
RE: Hello OA! - by Jargal - 02-11-2020, 03:12 AM
RE: Hello OA! - by Madine - 02-11-2020, 03:13 AM
RE: Hello OA! - by Jargal - 02-11-2020, 03:30 AM
RE: Hello OA! - by Jargal - 02-11-2020, 03:49 AM
RE: Hello OA! - by Drashner1 - 02-11-2020, 04:12 AM
RE: Hello OA! - by Jargal - 02-11-2020, 04:25 AM
RE: Hello OA! - by Drashner1 - 02-11-2020, 11:24 AM
RE: Hello OA! - by stevebowers - 02-11-2020, 07:20 AM
RE: Hello OA! - by The Astronomer - 02-11-2020, 02:47 PM
RE: Hello OA! - by Worldtree - 02-11-2020, 07:32 PM

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