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TIL “Stayin’ Alive” by Bee Gees was used in a study to train medical staff to perform CPR. The song has close to 104 beats per minute, and 100-120 chest compressions per minute are recommended by the British Heart Foundation.

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b9eA4 TIL that in trial accusing Judas Priest of subliminal messages in their songs that made two young men commit suicide, the band argued that if you play speech backwards some of it will seem to make sense, so they played their album backwards and heard ‘Give me a peppermint’ and ‘Help me keep a job’
D7nj TIL The Vikings used a stone which helped them track the sun for up to 40 minutes after it had set to aid navigating their warships
1vMd TIL There is a newly discovered cave fish with its anus on it’s head. It’s possible that it poops sperm into it’s mouth to fertilize eggs through it’s gills.
vnYx TIL That the Nazi Salute is said to have originated from the Roman Empire, but no surviving Roman art or text describes the salute. 18th century French painters labeled the gesture as the “Roman Salute”, and was adopted by European fascists in the early 1900s.
EgYbp TIL about the void that forms under certain trees when it snows, called tree wells. The upper branches of the tree prevents snow from falling below it, creating a pocket that is a serious peril for skiers & snow boarders. Several die every year from falling head first into these voids.