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73

TIL That the dot above an i or j is called a tittle.

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kOm7B TIL that 63 years after its launch on March 17, 1958, Vanguard 1 is the oldest satellite still orbiting Earth. Weighing only 3.2 pounds and with a diameter of 6.5 inches, Soviet Premier, Nikita Khrushchev, derided it as "the grapefruit satellite".
R7xo7 TIL: In 2017 Dr. Thatcher Cardon received $15,000 from NASA for winning the Space Poop Challenge. His prototype removes the waste from the space suit completely so astronauts don't need to take off their notoriously heavy, cumbersome, and uncomfortable space suits before going to the toilet
WDvA TIL a multi-national research team has created a model of a “Living and Breathing Supercomputer” that runs on the same substance that living things use as an energy source. The “biological computer” is fast, accurate, compact, and energy efficient.
V1M4 TIL the expression “sleep tight” originates from when mattresses were placed on top of ropes that needed regular tightening in the 16th-17th century
nWVmd TIL Social Media posts can be cited in APA format