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TIL foot strike hemolysis (damage to red blood cells from foot impacts) is one of the causes for runner's anemia

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Bg0Pr TIL that in 1632, Massachusetts banned smoking in public.
1OaP TIL that Nazi Germany had a research programme (Wunderwaffe) that included a stealth bomber, night vision, a 1,500 ton super tank, submarine aircraft carrier, an x-ray gun, and a satellite with a concave mirror to “make an ocean boil or burn a city”.
YJNx TIL Only 6 Celebrities have granted more than 200 Wishes for the Make-A-Wish foundation; John Cena, Jeff Gordan, Hulk Hogan, Justin Bieber, Dale Earndheart Jr. , and Michael Jordan. The leader of the pack, John Cena(450), says he fully fully intends on making it to 1000.
WkKr8 TIL about a Kiek in de Kök. An artillery tower in Tallinn, Estonia, built in 1475. It gained the name from the ability of tower occupants to see into kitchens of nearby houses.
NXrRP TIL Notre Dame Cathedral's landmark spire, being restored after the fire 4 years ago, new, 60' tall "heart of the spire", is made from centuries old oak trees.