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TIL the term “Crosshair” comes from when the military used actual hair in optics during WWII. Mary Babnik Brown first woman to have her hair used for military aircraft bombsights because she had never chemically treated or heated with a curling iron.

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Kx76 TIL it is estimated that 1,000 deaths occurred in the months following 9/11 because Americans chose to travel by car instead of by plane
9wgVQ TIL dummer boy Charley king was the youngest soldier to die in the American civil war. At the battle of Antietam he was wounded by a shell. He died of wounds in a field hospital near the battlefield on 20 September 1862. He was 13 years old
kEZ4 TIL that 3 people tried to sell Coca Cola’s secret ingredient to Pepsi, but Pepsi reported them to Coca Cola and the FBI
85YL TIL that the genetic testing of a boy who died 12,500 years ago proved that descendants of all Native Americans, including South & Central American tribes, can be traced back at least 24,000 years to a group of early Asians and Europeans who mated near Lake Baikal in what is now Siberia.
v1GPx TIL Pete is Disney's oldest recurring character, debuting three years before Mickey Mouse.