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KOZ84 TIL Hitchbot, a hitchhiking robot, made it all the way across Canada, Germany and the Netherlands but failed to do the same in the U.S. because it was immediately beheaded in Philadelphia.
WkNl8 TIL that every year on September 11, firefighters in the United States will climb 110 flights of stairs in full gear in buildings or at the gym to remember the 343 firefighters who lost their lives that day.
D1PWv TIL Rainbows in the dark are in fact possible. They're called moonbows and occur when the moon is brighter than usual.