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TIL that the last U.S. Army cavalry charge in combat occurred in 1942. American soldiers would not enter combat on horseback again until Army Green Berets used them in October 2001.

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4XBw5 TIL that the Sony PlayStation was never meant to be a product. It was intended to be a new console that would play exclusively Nintendo games on CDs. Instead Nintendo backed out of the deal at the last minute. Sony went ahead and launched what would become the most successful console of all time.
DQDvv TIL about the Graham's number. It is so large that the observable universe is far too small to contain an ordinary digital representation of Graham's number, assuming that each digit occupies one Planck volume, the smallest measurable space. The last 13 digits are ...7262464195387
eprj5 TIL that since 1997, a group of craftsmen has been building a medieval-style castle in France from scratch, using only 13th-century techniques, tools, and materials, as part of an ongoing experimental archaeology project called “Guédelon.” The estimated completion date is 2030.
0Ebp TIL that in 16th century London, a law forbade wife-beating after 9:00pm, but only because the noise disturbed people’s sleep.
rRAAd TIL a pod of killer whales used to hunt with Indigenous Australians. The pod would lead another whale into a bay then whistle to the hunters. After they had killed the whale, the pod would get the tongue and lips before the hunters took the rest.