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TIL Hedgehogs will rub a saliva-substance mixture (such as feces) on themselves in a process called Self Anointing. It's commonly thought this is to either absorb toxins for immunity or to deter predators through scent camouflage.

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xVELw TIL that everyone is actually blind in one part of their vision, and you can easily see this in action right now with a simple test. The cause is nerve fibers blocking the retina, and your brain just fills in this spot with surrounding images, so you don't normally notice it.
Oop01 TIL The latitude coordinates of the Great Pyramid of Giza match the value of the speed of light to seven decimal places.
ANL57 TIL that in 1976, 3 men kidnapped a bus full of schoolchildren with the goal of ransoming them back for 5 million dollars. They tried to place the ransom call, but the line was busy, and they ended up falling asleep. By the time they woke up, the children had freed themselves and made it to safety.
PJPL TIL: The director Roman Polanski pleaded guilty of raping a 13 year old girl in 1977 but fled the U.S to avoid charges, this is why his 2011 film Carnage staring Jodie Foster, Kate Winslet, Christoph Waltz and John C. Reilly although set in New York was actually filmed in Paris.
YpLax TIL the secular holiday Festivus was not invented for Seinfeld. It was created in the mid sixties by author Daniel O'Keefe as a way of rejecting the commercialism of Christmas with his family. His son later was a writer for Seinfeld and introduced his family's tradition.