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TIL of Olo, a colour that can only be seen via targeted lazers hitting certain colour receptors in the human eye to avoid overlapping with other colour receptors, allowing the target to see a "blue-green of unprecedented saturation"; the technology is now being investigated to help the colour blind

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9YPZ6 TIL The dimples on a golf ball allow it to travel up to twice the distance of a smooth ball. The dimples increase lift and decrease drag
69NW8 TIL In 1987 Paul Tudor Jones believed the stock market to be overvalued so he took an very risky short position. On Oct 19, 1987 the market crashed hard in what's now known as Black Monday. While many were wiped out, Jones walked away with $100M. His trade became legendary on Wall Street.
MNpA TIL Before 1956, troops of people went around detaching doors and smashing locks on abandoned refrigerators because refrigerator doors could only be opened with a latch from outside and children would often die after locking themselves inside during play.
KYYjE TIL that the capsaicin in chili’s comes from the white flesh not the seeds.
QN7Oa TIL a team of student volunteers on an archaeological dig at a site in northern France discovered a 200-year-old note left by an archaeologist who had performed an excavation of the site in 1825.