Now go outside and look at the sky.
Flight Sim History
While googling up another arcane feature of the Atari ST system hardware I stumbled over this: The Flight Simulator History page.
It offers a very comprehensive history of all versions of FS and background about its creators, and then in addition pre-built emulator packages so you can go and check out what Flight Simulator looked like back in the early 80s.
A perfect timesink for the rainy/snowy holiday season. :)