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TIL In 2013, a scientist injected human brain cells into a mouse brain, which improved the mouse's memory and ability to learn.

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b9Ngp TIL that Germany happens to be the only country that serves the McDonald’s McRib sandwich year round
4xBX TIL that during the height of the CA gold rush, an egg would cost the equivalent of $25 in today’s money, coffee went for $100/pound, and a pair of boots would set you back more than $2,500.
JMg1 TIL Not only were the founding fathers against the idea of political parties, John Adams once said: “This, in my humble apprehension, is to be dreaded as the greatest political evil under our Constitution.”
NZAP TIL there was an experiment done on Caucasian 3rd graders in 1968 called the “blue-eyed/brown-eyed” exercise which segregated the children by eye color. The exercise was held the day after Martin Luther King Jr’s assassination with the purpose of teaching students the effects of being a minority.
Z81NR TIL the purpose of menhirs, over 50,000 large man-made upright stones distributed across Europe, Asia and Africa, still remains unknown to archeologists.