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TIL: After the Vatican, the city with the largest collection of Christian relics is Pittsburgh, Pennsylvania

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LkM1r TIL of Project Thor which explored using large projectiles from 1,000+ miles above the Earth. The "rods from god" idea was a bundle of telephone-pole-size tungsten rods, dropped from orbit, reaching up to 10 times the speed of sound. The explosion would be on par with a nuke - but no fallout.
807X TIL a man name Jamie Rohrs left his children and girlfriend in the theater during the 2012 Aurora Theater Shooting. His family received help from 18 year old Jarell Brooks, who used himself as a human shield. Later that evening, Rohrs proposed to his girlfriend at the hospital and she accepted.
9YgX TIL that the University of Iowa’s locker room for visiting football teams is completely painted pink
gr0k8 TIL that sloths can hold their breath longer than dolphins—up to 40 minutes—by slowing their heart rate to conserve oxygen
XEnj TIL a Canadian polymer $20 bill costs 19 cents to manufacture