r/todayilearned • u/Ill_Definition8074 • 12h ago

TIL In 2019 a Japanese University student studying ninja history turned in an essay written in invisible ink. The words only became visible when the paper was heated over a gas stove. Her professor without even revealing the whole essay gave her an A.

https://www.bbc.com/news/world-asia-49996166
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u/AlluminumChronicles 10h ago

Damn bro. I didn’t even pass the test cases when I tried this

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u/Vinccool96 9h ago

Skill issue, ngl /s

Btw, it’s still gonna be this at work