› added 6 years ago

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TIL at Gettysburg a Union regiment sacrificed itself by charging into a Confederate force that outnumbered them 5 to 1. They suffered 82% casualties in 5 minutes, including the commander. However they managed to buy time for Union forces to establish defensive positions that stopped Pickett's charge

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4XEMJ TIL that RH null is a blood so rare, only 40 people in the world have it. It's a universal donor among many people with other rare blood types, and as such has been called the "golden blood" because its life saving capability is enormous.
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