I was reminded of a novella–Thor Meets Captain America, by David Brin. Whoah–double-checking on his name, I found this: http://www.davidbrin.com/thor1.html

ooh ooh ooh, also this one (from the same collection): http://www.davidbrin.com/loomofthessaly1.html

I’m going to have to spend more time on his website! Bookmarking it now…