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TIL, about Joan Struthers Curran who, developed Chaff used to disguise where the D Day invasion was going to happen, but was never awarded a Degree in her time "because women were simply not granted degrees". Remarkable

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v1GYB TIL of John Jones. A medical student who was trapped in the Nutty Putty cave while spelunking in 2009. Rescue attempts were unsuccessful and the cave entrance was eventually sealed with concrete. John's body is still there today.
j6jVX TIL: Roman Emperor Valentinian the Great was one of the most popular emperors due to repelling several invaders, strengthening the borders, and handled the Great Conspiracy in Roman Britain. Unfortunately he died from a stroke while angrily yelling at envoys. Scholars say he got so mad, he died.
kOOed TIL that the term "chain gun" is a registered trademark
XnPP TIL that on her 56th birthday, Carol Burnette woke up to news that her friend and mentor Lucille Ball had died. Flowers arrived later with a note that said “Happy Birthday, Kid. Love Lucy”.
dDmR7 TIL there are two "4K" resolutions: 3840x2160 and 4096x2160