› added 7 years ago

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TIL that those of us who can throw our vision into and out of focus at will are actually contracting and relaxing tiny 'ciliary bodies' inside our eyes which distort the shape of the eye's lenses

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9wkNQ TIL about the "Book of Negroes", an official record of 3,000 Black Loyalists, mostly former slaves, evacuated to Nova Scotia (and freedom) after the American Revolutionary War
VeW0 TIL kraft singles (processed cheese) cannot be advertised as cheese because US FDA standards states a food can only be identified as a cheese if it contains ‘at least 51% real cheese’
5ZPp TIL a dumb hole is like a black hole, but sound waves rather than light waves are absorbed and cannot escape. A lab created one in 2009
xVwV7 TIL Since 1953, women in South Korea have been allowed to take one day off a month if they have painful periods.
8aBEL TIL A Japanese fish called Hanako (1751-1977) lived for 215 years. The longest living koi fish ever recorded.