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TIL that humans are the only living great ape species who have 23 pairs of chromosomes, all other species have 24 pairs.

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mjLp TIL that after receiving 13 liters of blood at age 13, a man named James Harrison pledged to donate blood once he turned 18. It was discovered that his blood contained a rare antigen which cured Rhesus disease. He has donated blood a record 1,000 times and saved 2,000,000 lives.
QJQNM TIL the 99 cent pricing first became popular in the nineteenth century, shortly after the invention of the cash register. The pricing ensured that the cashier was forced to ring-in the transaction to create a record of it and return change to reduce the risk of the cashier stealing from the store.
GYW7Q TIL Two weeks before the Castle Gate Mine disaster that killed 171 men, the Utah Fuel Company laid off many of the miners without dependents during a shortage of coal sales. As a result, 114 of the men killed in the disaster were married men and left behind 415 widows and fatherless children
xVvrB TIL Rubbing your eyes increases the pressure within the eyeball and this pressure activates ganglion cells in the retina in the same way as light does. Your brain doesn’t know the difference and so interprets the activation as though you were seeing light from the world outside.
4XYL6 TIL In 1967, Jimmy Hendrix was the opening act for The Monkees. The group also blew the whistle on themselves, letting the world know The Wrecking Crew studio band had been playing instrumental for them on their albums. After that, they played their own instruments.