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TIL Palomar Observatory representatives have managed to persuade the city councils of San Diego and its neighboring communities to light their streets with low-pressure sodium lamps in order to reduce light pollution for their astronomers

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JYDgm TIL desegregation resulting from Brown v. Board of Education led to the layoff of 38,000 black teachers when school districts were integrated, even though black teachers had a greater percentage of college attainment than their white counterparts. 90% of black principles were also laid off.
gr7pL TIL: The first Transatlantic telegraph cable was laid in 1854 and the first communication took place in 1858
ZGQY TIL in 1994, the operational head of the U.S. Public Health Service was fired for saying masturbation should be encouraged in order to prevent people from engaging in riskier forms of sexual activity.
KODD4 TIL Eagle's can view something the size of a rabbit from 3 miles away. They see more colors than humans, and can also see in the UV range of light (allowing them to see the urine trail of prey)
m15Py TIL that famous children’s author Shel Silverstein (Where the Sidewalks Ends, The Giving Tree) wrote Johnny Cash’s famous song A Boy Named Sue.