We only know about when humans mastered fire or started using metal. But we know the exact date when the first powered flight took place. What are some really early “first ____” we know the date of for sure?

    • VindictiveJudge
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      38 months ago

      Yeah, that’s just the earliest known written complaint. And since the city was already two thousand years old at the time, the odds of there having been more are very high.