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TIL The Bluetooth symbol is a bind-rune representing the initials of the Viking King for who it was named

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nW4n7 TIL: Horseshoe crabs are vital for the survival of migratory birds. As migratory birds fly from South America to nesting sites in the Arctic, they stop in the Mid-Atlantic to "re-fuel" on freshly-spawned horseshoe crab eggs.
VBAVm TIL that sometimes physicists use the supernatural in their hypothetical thought experiments in the form of demons.
ADZo4 TIL that James Gunn has a playlist of over 500 songs that he thinks Peter Quill's mother would have really liked and pulls from that list when he thinks a song would suit a scene. Disney has never rejected any of his songs.
v1be7 TIL of patient AB - "the first and only instance in which hallucinatory voices sought to reassure the patient, offered her a specific diagnosis, directed her to the hospital, expressed pleasure that she was well again, bid her farewell, and thereafter disappeared."
daZ TIL that the average person consumes 0 spiders in his/her lifetime