I have been planning something for that 25th anniversary, by the way, with the help of the good people of PS Publishing. More about that soon.
Meanwhile, I'm researching the background of a story:
The interior of a Lun class ekranoplan;
Tropical kit worn by Russian naval officers;
What the topography of Venus would look like if its surface was cool enough to support liquid water;
Carboniferous megafauna . . .
I've been doing what amounts to homework for almost three decades. That hasn't got old, not at all.