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TILD Eating spicy foods releases endorphins in your brain similar to a "runner's high".

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W7NkL TIL: The humble and magnificent chocolate chip cookie is less than 100 years old.
ZpGDv TIL about the ‘cat organ,’ a hypothetical musical instrument consisting of a line of cats with their tails stretched out underneath a keyboard, causing them to cry out when a key is pressed.
Oo917 TIL the Asian golden cat is a medium-sized feline native to SE Asia. The most conspicuous features of this cat are the distinctive off-white markings on the crown, face and cheeks, and its roundish ears and long tail. Little information is available on its behavior, range and population in the wild.
KYLew TIL that the Tetrahymena thermophila, a single-celled ciliated unicellular eukaryote, has 7 different sexes. Any two different sexes can mate and produce offspring, and the sex of the offspring can be any of the 7 different types. This allows for 21 different mating combinations.
KOWZR TIL the USA spent $14mill researching marine mammals as weapons in 2017 (e.g. dolphins and sea lions)