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School buses are yellow because we see yellow faster than any other colour; 1.24 times faster than we see red.

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BgeOb TIL The USA boycotted the 1980 summer olympics because it was held in Moscow
gZ9b TIL in ancient Persia, engineers built a type of evaporative cooler that could store ice, even in the middle of summer. It is called a Yakhchal.
a8Evy TIL that the reason printers refuse to print without yellow ink is because they print a Machine Identification Code on every page, leaving a unique microscopic pattern of yellow dots that say what the serial number and model of the printer is, allowing the documents to be traced back to the owner.
n8Ad Today I learned: Vivian Banks (Janet Louise Hubert) was fired from The Fresh Prince of Bel-Air because of drama between her and Will Smith.
wLBy6 TIL: Ceiling Fans have a directional switch (counter-clockwise & clockwise) that are meant for Warm & Colder Seasonal Months to benefit wind direction and how to stay cool during the summer months.