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TIL that the woman who started the Mother’s Day tradition in the US was so opposed to its commercialization that she spent her whole inheritance and her remaining years of life protesting what the holiday had become

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nWdgP TIL that Pope Marcellus II who was ruler of the Papal States from 10 April 1555 to his death, 22 days later, is the most recent pope to choose to retain his birth name as his regnal name upon his accession, and the most recent pope to date with the regnal name "Marcellus".
j61kv TIL In certain situations (the conditions of which are still up for debate) warm water has been observed to freeze faster than cold water, as the result of what is known as the Mpemba effect. These observations go far back enough to be traced to claims by ancient philosopher Aristotle.
b9wpp TIL about the practice of widow's succession. This was a practice used by several countries in the early 20th century were if a politician died in office they would be succeeded by their widow. The practice resulted in some of the earliest women to hold political office in modern times.
EgrPw TIL the Japanese history textbook controversies involve controversial content in government-approved history textbooks used in the secondary education of Japan. The controversies primarily concern the nationalist right efforts to whitewash the actions of the Empire of Japan during World War II.
16JRd TIL when snowflakes hit water they create a screeching sound too high for humans (but not some sea animals) to hear. When a flake hits the water, an air bubble is released that oscillates in the 50-200 khz range well above a human's range. Snow hitting water can increase underwater sound by 30 db.