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TIL the US Air Force maintaines a team that logs and tracks space debris. Over 20,000 items, ball sized or larger, and 500K marble-sized pieces are being tracked. They’re traveling at 28,000 KMPH. A single speck of paint could cause extreme damage to spacecraft or kill an astronaut on a space walk.

Read more nasa.gov

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LQvkP TIL chainsaws were invented in the late 1700s for assisting in childbirth (cutting through the woman's pelvis if the baby got stuck).
mxrlx TIL that Haiti and Liechtenstein had the same flag at the 1936 Berlin Olympics,which prompted Liechtenstein to add a crown to theirs the following year.
69LwZ TIL: There was a German medical study on Shuriken (ninja stars) wounds. They used pig carcasses while researchers threw a cyclone shuriken, a plastic one, and a traditional one. All 3 were capable of inflicting fatal wounds. This study served to promote discussion on the German shuriken ban of 1980.
78JX TIL North Korea dug tunnels into South Korea to create a way to invade with out having to go through the DMZ.
e0oAE TIL that in 1914, police in California hired two men to lure homosexuals into public "glory holes" where the pair would score their victims penis with permanent markers and then drag them to the police station to be prosecuted.