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TIL of Lady Margaret Beaufort, the mother of King Henry VII. She had her son at just 13 years old after marrying Edmund Tudor, who was 12 years her senior. He died of the plague when she was seven months pregnant. Since she was so young, the birth was extremely difficult.

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mLdx TIL an employee of the Kodak Camera Company discovered in the 40s that there must have been some sort of nuclear test on United States mainland. Realizing the importance of his discovery, he kept his findings a secret until 1949.
aw46o TIL that Maria Sharapova's on court grunt has been recorded at a volume of 101 decibels. That's louder than a motorcycle, a lawnmower and a small aircraft. In fact it's only 5 decibels less than a lion's roar.
JY1vB TIL you must be permitted access to any library that is part of FDLP, even the private ones that otherwise deny you entry unless you specifically remind them about their participation in the FDLP program.
mxWoo TIL of Sam Panopoulos, a Greek Canadian restaurateur who in 1962 at the Satellite restaurant in Chatham, Ontario, decided to put ham and pineapple on a pizza, aiming for something sweet and savory. He called it the Hawaiian pizza and his food invention has earned wrath and praise ever since.
Z84mR TIL about Air New Zealand flight 901, which provided sightseeing flyovers of Antarctica until it crashed into the side of Mount Erebus in November 1979. Most of the wreckage is still there, and can periodically be seen during warmer weather.