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TIL You can have a heart attack without having any blocked arteries, it’s called a MINOCA(myocardial infarction with non-obstructive coronary arteries)

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owOL TIL the first automobile trip across the United States was undertaken in 1903 because of a $50 bet. The trip took 66 days.
a89kZ TIL Fairy Shrimp are a species that lives in ephemeral pools of rainwater, and completes its lifecycle by laying eggs by the time those pools dry up. Its eggs then wait until the next time that pool fills, even years or decades, and the cycle repeats
OGoDX TIL A century before Martin Luther, Jan Hus criticized the Catholic Church for selling of indulgences and church positions. Hus was invited to the Council of Constance, arrested, charged with heresy, and burned at the stake on 6 July 1415.
QdnX TIL of the Holodomor, an attempted genocide with a death toll surpassing that of the Holocaust. Between 1932-1933 Stalin purposely starved up to 7,000,000 Ukrainians.
N70db TIL that in Nazi Germany people who were classified as Jewish could challenge their classification in court. This included looking for Jewish facial features but since anti-Semitic clichés on Jewish appearance were so exaggerated and stereotyped, the average litigant did not show these features.