27,661
reputation
4
5
Mark Olson
I'm a retired chemical physicist-turned software developer and manager and a science fiction and history enthusiast living outside Boston.
2
answers
0
questions
~459
people reached
-
Member for 3 years, 2 months
-
7 profile views
-
Last seen Dec 4 '20 at 1:39
Communities (8)
Top network posts
Badges (9)
Gold
—
Silver
4
Rarest
-
Jul 13
Bronze
5
Rarest
-
Sep 10
-
May 2 '18
-
Jul 12
