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The original was posted on /r/todayilearned by /u/yooolka on 2025-07-13 20:26:58+00:00.

Original Title: TIL that Tesla once worked for Edison, who promised him a large sum to improve his DC system. But when Tesla succeeded, Edison retracted the offer, claiming that he “didn’t understand American humor.” Feeling betrayed, Tesla quit and set out on his own.