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Mark Olson's user avatar
Mark Olson's user avatar
Mark Olson's user avatar
Mark Olson
  • Member for 6 years, 5 months
  • Last seen this week
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About

I'm a retired chemical physicist-turned software developer and manager and a science fiction and history enthusiast living outside Boston.

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Top posts
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answer
88
When did the Roman Empire fall according to contemporaries?
Jul 11, 2019
answer
87
Did Aztecs know how many continents there are on earth?
Mar 2, 2021
answer
75
How did the general population of England convert so smoothly to Protestantism?
May 22, 2018
answer
53
Why did Lincoln wait to issue the Emancipation Proclamation?
Jan 16, 2019
answer
46
What is the difference between the Ancient Greek religion and the Ancient Roman religion?
Nov 1, 2019
answer
41
Why were the names of Western Roman emperors mostly unique?
Jul 24
answer
31
Why did epidemic disease spread only from Europe to America and not both ways in the Columbian Exchange?
Nov 28, 2023
answer
31
Did early imperial China have a "uniform, multilevel administrative bureaucracy" that the Romans did not?
Oct 31, 2023
answer
30
What is the pre-schism Christian church called today?
Jul 17, 2018
answer
23
Why does the US use the opposite convention to the rest of the world for colour-coding harbour buoys?
May 19, 2022
Top network posts
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294
What did Frodo and Sam eat when they crossed Mordor on foot?
122
How far did Gandalf and the Balrog drop from the bridge in Moria?
121
What's the big deal about the Nazgûl losing their horses?
110
My time machine needs to know when it is
103
Was Tolkien good at his day job?