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TIL There's a pink manta ray near Australia. It likely has a genetic mutation causing the unusual coloration.

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VBN14 TIL in the UK, "death by misadventure" is the official term for an accidental death caused by a risk taken voluntarily. In contrast, a coroner determined that the deceased had taken no unreasonable willful risk. Notable death by misadventures include Amy Winehouse, Bon Scott, and Stephen Milligan
mx6Qy TIL of the Chinese submarine Changcheng 361. After disappearing while submerged, she was later found when fishermen spotted a periscope above the surface. An engine failure had suffocated the entire crew; the ghost submarine had spent ten days drifting aimlessly below the waves.
Lkg9r TIL that supposedly the Violin Sonata in G minor (Devil's Trill Sonata) was made by Giuseppe Tartini in an attempt to recreate a song the Devil had played to him in a dream.
AN6Ml TIL in 1982 a crew of five sailing from Maine to Florida ran into a storm with 30-foot waves which capsized their boat. Over the next five days, two of them became delirious after drinking saltwater and walked off the dinghy into many awaiting sharks. Infection killed a third, leaving two survivors.
RKDQ TIL Dolphins can communicate with one another over a telephone, and appear to know who they are talking. In one experiment carried in an aquarium in Hawaii, the mother and her two-year-old calf in another tank, connected by a special underwater audio link, recognized each other and “talked”.