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TIL that the disappearance of D. B. Cooper remains the only unsolved air piracy case in commerical aviation history.

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rRo11 TIL leopard slugs have 27,000 teeth.
kJ6a7 TIL about the Barkley Marathon - a 55 mile race that retraces the path of escaped prisoner Jame Earl Ray (killed MLK). It has been run annually for over 30 years but only 15 entrants have ever finished.
0wa4y TIL that while kittens will mew for their mother, adult cats only meow at humans, and no other species because animals have their own way of communicating.
p89mO TIL Total Solar Eclipse helped prove Einstien right about Relativity, making him an instant celebrity.
0wrdy TIL Self-checkouts aren’t necessarily faster than other checkouts and don’t result in lower staff numbers, & there are indirect costs such as theft & reduced customer satisfaction and loyalty. But they better suit the trend of shoppers buying fewer goods, more often.