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TIL that the planet Mercury has a tail, much like a comet, thanks to sodium atoms blasted off its surface and atmosphere by solar winds

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mE4o TIL that a Labrador Retriever service dog pulled his disabled owner into the recovery position after he was struck unconscious, then covered him with a blanket. Retrieved his mobile phone and pushed it against his face, and only left his owner to fetch help once he had regained consciousness.
eB0L TIL The Colombian army created a pop song with a Morse code beat to communicate with kidnapped military personnel
69yGl TIL that a sphincter muscle, similar to the one humans use to hold in gases, prevents water from entering the blowholes of marine mammals.
kJBL5 TIL Since 2018 all new cars sold in the United States and Canada have had to include a backup camera. The first mass production car to include a backup camera was the Toyota Soarer in 1991, though concept cars such as the 1956 Buick Centurion had the feature aswell.
oBAX8 TIL that despite the popularity of the legend of King Arthur, no English monarch from 1066 onwards ever took the name after coronation