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TIL The USDA defines sandwiches as, "at least 35% cooked meat and no more than 50% bread" for closed sandwiches, and "at least 50% cooked meat" for open sandwiches.

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x6jA1 TIL At least ∼21% of the 8000 earthquakes larger than Mag 1.5 detected in the UK between 1970-2012 were human caused, most often linked to coal mining
EjwP TIL after a Soviet doctor in Antarctica had to remove his own appendix, all Austrialian doctors must have theirs removed before allowed to stay there.
5Wwn TIL two Frenchmen dueled each other from hot air balloons after discovering they “shared, rather too closely, a mutual acquaintance.” When a height of roughly 900 yards was achieved, the two fired shots. The first one to fire missed and was, in turn, sent to his death in a matter of seconds.
LQXJP TIL Legenday blues musician B.B. King was actually born Reilly King and used his given name professionally early in his career. While working at a radio station he used the name "Beale Street Blues Boy," which morphed into just "Blues Boy," and eventually just "BB."
GYwp4 TIL when Paul McCartney was recording the album Ram, he brought in some of the cooperating musicians under the guise of conducting a session to record a commercial jingle.