[ahane]

The piece was posted on The Archdruid Report (https://thearchdruidreport.blogspot.com) and was called "The Next Ten Billion Years".

In a bit of an unconventional move, the author has closed down the blog and is now selling the previously free articles as ebooks. There are a lot of valuable perspectives in his writing, so it might very well be worth the purchase. Most of it is not in the "short story format" that you remember though. (http://www.foundershousepublishing.com/).

There might also be an free archive somewhere..

[hoelzro]

I found it on archive.is: http://archive.today/2016.10.25-213332/http://thearchdruidre...

Funny thing - I was thinking about this post a few years ago but also couldn't remember where I'd read it; I ended up writing a program to download the pages I'd visited since 2012 (using a heuristic to discard unlikely entries and to promote likely ones). That's probably the most effort I've gone through to find something on the Internet!