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TIL that an entomologist called Justin Schmidt allowed plenty of venomus insects to sting him in order to record the pain intensity in what's called "Schmidt pain Scale".

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GYL5Q TIL a walnut-sized parrot brain contains more neurons than a lemon-sized monkey brain, and bird brains in general have much higher cognitive power per pound than mammal brains. Being called bird-brained should be a compliment, not an insult!
5k99 TIL that Mormon prophet Joseph Smith claimed that a race of uniformly 6-foot-tall humans who dressed like Quakers and lived to the age of 1,000 resided on the moon.
epBL6 TIL the term “debugging” comes from an incident that occurred while Grace Hopper was working on the relay contacts of the Harvard Mark II. A moth flew into the computer and was electrocuted to death. Hopper literally had to “debug” the computer which is where the term came from.
LZav TIL Your lips will start to decompose after eating too much pineapple because of the presence of the bromelain enzyme which is so strong that it breaks down the proteins in meats.
gMkOW TIL about the Sorites Paradox, a paradox that arises from vague predicates. If you remove a grain of sand from a heap, it is still a heap of sand. When the process is repeated enough times: is a single remaining grain still a heap? If not, when did it change from a heap to a non-heap?