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TIL the chemical composition of emotional tears differs from those secreted due to irritation (such as tears caused by onions). Emotional tears include more protein-based hormones such as prolactin and leucine enkephalin, a natural painkiller that acts as the mechanism that allows one to feel better

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R7Pa TIL roughly 14% of humans do not have a Palmaris longus muscle in their arm. Presence can be checked by touching pinkie to thumb and flexing the wrist.
loj77 TIL of George Weah from Liberia. For 18 years, he was a renowned soccer player, being currently the only soccer player from Africa to win the Ballon d'Or and the FIFA Player of the Year. In 2018, he was elected as the 25th President of Liberia, making him Liberia's head of state and government.
W7L8B TIL that, in 1805, Carl Friedrich Gauss had actually invented Fast Fourier Transform even before Fourier Transform itself but it was forgotten because he didn't publish it. It was re-invented about 160 years later by James Cooley & John Tukey, in a bid to detect nuclear bomb testing underground.
QNPnX TIL that Signal Fire by Snow Patrol, which appeared in trailers for Spider-Man 3, as well as the end credits, was originally wrote for use in Shrek the Third.
kJZjB TIL that in 1989, a group called "The Breeders" caused a medfly infestation in California to protest spraying of the insecticide Malathion, devastating crops and costing $60 million in eradication efforts. The state ceased this spraying in response.