DrZ214
  • Member for 6 years, 6 months
  • Last seen this week
0 answers
3 votes
171 views
Along side Roman roads, where did the drainage ditches lead?
3 answers
5 votes
205 views
In WW2 USN ships, what was the weight of a typical boiler?
3 answers
12 votes
1k views
1 bookmarks
What did indigenous North Americans trade amongst themselves before Europeans arrived?
1 answers
4 votes
213 views
What is the number of slaves imported from Africa to the Americas by non-British countries?
0 answers
0 votes
108 views
After the Japanese declaration of War, what happened to the Japanese Embassy in Washington DC?
0 answers
1 votes
146 views
Under the Molotov-Ribbentrop Pact, how many of each aircraft did the USSR receive?
1 answers
2 votes
500 views
1 bookmarks
In WW2, what was the barrel-change rate of the Bofors 40-mm?
2 answers
4 votes
1k views
1 bookmarks
What were traffic lights like in the USSR?
1 answers
5 votes
573 views
Do we have any authentic Native American flute music from the 18th century or earlier?
0 answers
3 votes
117 views
How were steam turbines typically manufactured in the interwar period (1918 - 1939)
1 answers
0 votes
187 views
Before Liberty Ships became widely available, what kind of cargo ships supplied Britain?
3 answers
10 votes
3k views
3 bookmarks
Did a German plane really land in Moscow in 1941 May?
2 answers
16 votes
3k views
How many people worked to build one Liberty ship?
6 answers
116 votes
20k views
30 bookmarks
Did China ever consider a phonetic writing system?
1 answers
13 votes
953 views
1 bookmarks
Did any Chinese scholars propose a heliocentric model?
1 answers
7 votes
305 views
What is the oldest known board game for 3+ people?
3 answers
19 votes
1k views
2 bookmarks
Before European influence circa 1600, did any Chinese believe the Earth was spherical, and did they ever try to measure it?
2 answers
6 votes
283 views
1 bookmarks
For steam trains, what kind of deaerator was used, if any?
1 answers
3 votes
303 views
1 bookmarks
After the Mongol Empire fell, did China really turn away from math and physics?
1 answers
8 votes
262 views
1 bookmarks
What alloy was used in early steam turbines? (1900 - 1930)
1 answers
8 votes
527 views
3 bookmarks
Are there any archeological finds or primary source drawings of the Chinese "blade shaped" bamboo-copter or rotary fans?
6 answers
14 votes
2k views
2 bookmarks
Did the Red Army and German Army clash in Poland in 1939?
2 answers
3 votes
1k views
During WW2, what were working conditions of factory workers in Russia?
1 answers
1 votes
225 views
When Genghis Khan took power, what was the population of Mongolia?
1 answers
9 votes
772 views
1 bookmarks
Did Ancient China use lead in their food/water industry as much as the Romans?
2 answers
9 votes
1k views
2 bookmarks
Who first conceived and developed the acoustic homing torpedo, and when?
3 answers
48 votes
9k views
4 bookmarks
When did FDR announce he was running a 3rd time, and was there any outrage?
3 answers
3 votes
931 views
Why was Stalin chosen as the First General Secretary in 1922?
3 answers
5 votes
838 views
1 bookmarks
During WW2, why did the USA occupy Clipperton Island?
1 answers
3 votes
1k views
During WW2, how dependent on Swedish Ball Bearings was Britain?
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