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TIL pneumonia has been called “the old man’s friend” because of its tendency to quickly kill off those close to death, ending their suffering.

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dDMW9 TIL "Champing at the bit" is the original, technically correct turn of phrase while "chomping at the bit" is a newer, now acceptable variation
wLPEo TIL 47% of Millennials ages 18 to 29 have tattoos, 36% of Generation X'ers do too, but only 13% of Boomers are inked.
VBRG4 TIL Boeing used depleted uranium plates as counterweights in its 747 airplanes and some helicopters. While relatively safe, some of these plates have been lost. They stopped using it completely in 1981.
DdOr TIL an Area 51 researcher claims that the “aliens” that allegedly crash-landed there were WWII POW’s who were being experimented on to study the risks of space exploration on the human body and that the images of aliens are, therefore, derived from that of humans whose bodies were destroyed.
16k9X TIL Fritz Lang’s film “Woman in the Moon” is often cited as the first occurrence in media of the "countdown to zero" before a rocket launch. It was so influential that the first successfully launched V-2 rocket at the rocket facility in Peenemünde had the Frau im Mond logo painted on its base.