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TIL that Abu Zayd al-Balkhi (850–934 CE), a Persian scholar, rejected the idea that mental illness was caused by demons or supernatural forces. He recognized conditions like depression and anxiety and argued they had natural psychological and physical causes, centuries ahead of modern psychiatry.

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JYRxv TIL I learned of Derek Paraviccini, an autistic musical savant. Although born blind and barely able to care for himself, he plays piano with superhuman clarity and accuracy.
M701m TIL of Cassiopea xamachana. A species of upside-down jellyfish capable of spawning venom filled, homing torpedoes that swims independently from the animal and allows it to kill/stun prey from a distance.
dbn7 TIL the hit show “To Catch A Predator” was cancelled in 2008 because an assistant to the Texas DA office shot himself after he was caught talking to and exchanging pictures with a decoy posing as a 13 year old boy.
b9d84 TIL about 'the Tridge', a three legged wooden footbridge that spans the confluence of the Chippewa and Tittabawassee Rivers in Chippewassee Park in Midland, Michigan. The three legs span out to Chippewassee Park, St. Charles Park and the Farmer's Market areas.
5VoXB TIL Nutrition Labeling of food was not required until 1994 in the US, and was considered controversial at the time.