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TIL of Märket, a tiny island divided by the finnish-swedish border. When the finns inadvertedly built a lighthouse on the wrong side of the border, the swedes agreed to trade it for an equal spot of land on the other side, causing the border to zig-zag.

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VJdp TIL that the vibrator was created to treat Hysteria because doctors were taking too long to manually masturbate women.
oBoWK TIL that when you have something on the tip of your tongue, but all you can think of is that similar (but not the desired) fact, those intrusive thoughts are called "Ugly Sisters".
wLwpJ TIL one day Isaac Newton was asked by his colleagues why planets’ orbits are elliptical. He couldn’t answer so he went home and started thinking about it. A while later he invented differential and integral calculus, which he then used to answer the question.
xydw TIL in Algeria, the largest country in Africa and 35th in world population, women make up 70% of the country’s lawyers and 60% of its judges, as well as dominating the field of medicine. Increasingly, women are contributing more to household income than men. 60% of university students are women.
wLMW1 TIL Hitler took amphetamines to stop farting. Some historians think that's why he became increasingly erratic toward the end, he was in withdrawal.