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TIL Over the course of the evolution of mammals, one lower and one upper jaw bone lost their purpose in the jaw joint and were put to new use in the middle ear, giving mammals improved hearing ability.

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epw6n TIL one of the moons of Mars (Phobos) orbits Mars much faster than Mars rotates, and completes an orbit in just 7 hours and 39 minutes. From the surface of Mars it appears to rise in the west, move across the sky in 4 hours and 15 minutes, and set in the east, twice each Martian day.
BY4W TIL college professors implement digital codes in their books to fight piracy. Requiring students to complete weekly assignments on online programs that are accessible only with the codes provided in the required text upon purchase. So students have to pay over of $100 just to submit homework.
1aAe7 TIL in Portland, Oregon (2006) a 58 year old husband hired a Hit man to murder his wife. When his wife returned home she encountered an intruder wielding a claw hammer. After a struggle, the 51-year-old nurse fended off her attacker by strangling him with her bare hands.
Xpjj TIL that Philip K. Dick never saw the completed version of “Blade Runner” and Ridley Scott never finished reading “Do Androids Dream of Electric Sheep?”
VM4bk TIL the first gladiatorial game of Ancient Rome was held in the city's cattle market in 264 BCE, where funeral celebrations for a former consul included combat between six war captives. Initially competitions of courage to honor the dead, gladiator matches were not publicly sponsored for 160 years.