› added 7 years ago

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TIL tennis balls were traditionally black or white. They were changed to yellow in 1972 after research showed they were more visible on television.

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eWkk TIL that in the US, in order to be legally called “chocolate”, a product must contain cocoa butter. Phrases like “chocolatey” and “chocolate flavored” are used for products that do not contain cocoa butter, but instead use other vegetable oils. These have a different taste than “real chocolate”.
9Y4Rp TIL, The Macaw species that inspired the movie 'Rio' is now extinct in the wild
kJkLW TIL Harris Hawks will stand on each others backs when there's limited perch space. It's called back stacking
WkNVA TIL of John Brown, an abolitionist who was the first person convicted and hanged for treason in the United States after attempting to lead a slave rebellion in 1859.
8dGb TIL - McDonald’s, Starbucks, Victoria’s Secret and Boeing use prison labor for some of their products.