About a year ago, I remember finding a website featuring a large number of fictional accounts of extinct alien civilizations (it might have been around 300). In universe, these were only a sample of a collection originating from a mysterious extraterrestrial source (I believe reading the term Encyclopedia Galactica), which allegedly held a significantly larger amount of accounts.
I read a few of these (which always seemed to contain a single individual's perspective of sometimes trivial pre or post apocalyptic events), and decided to postpone reading the rest.
One such story was about a postapocalyptic raider offering another member of its species a position due to his ability to read and write. This was set to the background of a world, in which the sun's radiation was apparently overheating the planet.
Attempting to find it via Google was entirely unsuccessful so far. Terms such as "Encyclopedia Galactica", "alien", "civilization" and "extinction/apocalypse" unfortunately combine very badly, and I am afraid there is a possibility the website has gone offline in the short time since initially finding it.
I believe remembering that I found this site over a link from the SCP foundation or it's sister project, the Wanderers' Library, which I was also reading through at the time.
Does anyone know of the website and/or the author?