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TIL the oldest known human drawing is a 73,000-year-old cross-hatched pattern made with ochre on stone flake, found in South Africa. This discovery predates previously known drawings by at least 30,000 years, revealing early Homo sapiens' ability to create symbolic designs using various techniques.

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LQyrp TIL William Wrigley initially offered free baking powder as a gift for his soap but the powder turned out to be more popular. He switched to selling the powder and added sticks of gum as a gift. The gum became incredibly popular thus forcing him to switch and became the world's leading gum company.
MQxb TIL that the largest solar energy plant in the world may create a number of safety hazards once it is up and running. Critics have argued that it would be powerful enough to vaporize birds, blind drivers miles away, flip small airplanes, and attract Air Force heat-seeking missiles.
QJJJX TIL Lou Gehrig had a better batting average than Babe Ruth in each of the years 1923-25, but Ruth had a better batting average than Gehrig over the 3 years combined. This is an example of a mathematical curiosity called Simpson’s Paradox.
OG7JR TIL about calques. Calques are loanwords from other languages into English. However, unlike loanwords (ex:restaurant), calques are translated into English. Examples include: potsticker, beer garden, ear worm, and flea market.
GAgr7 TIL there's a type of tick in the U.S. thats bite can make you permanently allergic to red meat (beef, pork) and milk