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TIL The Vikings used a stone which helped them track the sun for up to 40 minutes after it had set to aid navigating their warships

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9MR7 TIL we hate the recorded sound of our voice because our skull changes its resonance from within and creates more bass.
ovE TIL: There are female condoms, for potential rape victims, soon to hit American shelves that have a row of razor sharp barbs and can only be removed by a doctor.
YpaBd TIL when Bill Gates was in high school, he hacked the school computers so that he was placed in classes with mostly female students
j6V8E TIL About the British Free Corps. Made of up volunteer British POWs during WW2 it was attached to the SS. Never rising above platoon strength it never saw any significant action and unit survivors were either court martialed, imprisoned or executed.
R7wKw TIL about Anatori Crypts in northern Georgia. A crypt villagers used to lock themselves in during the plague so they wouldn't infect others.