| When did "being gay" become a thing? | 5 | | | | |
| What were the lasting effects of Ghengis Khan's (and the Mongol empire as a whole) on Europe/Asia? | 2 | | | | |
| Why were historical rulers so bad at choosing military leaders? | 2 | | | | |
| How close were the Nazis to winning world war two? | 1 | | | | |
| When was standardised date first used? | 1 | | | | |
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