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TIL Two notes can be sung by one person at the same time, aka. polyphonic overtone singing

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mvlv TIL when you smile with your eyes it’s known as a Duchenne smile and genuinely smiling in this way i.e. the more muscles you use when you smile, the happier you will be whatever you are doing. (Last paragraph)
p7De TIL Heath Ledger kept a “Joker Diary” in which he wrote as the Joker, and included a list of things he thought the Joker would find funny, including blind babies and AIDS
kOxpg TIL-An undergraduate architecture student in '78 found a flaw in the Design of Citicorp Center '77: that Citicorp Center could blow over in the wind. Repair work was done throughout the night and quit at daybreak, just as the building occupants returned to work. The story remained a secret until '95
M7NPW TIL - The miscarriage rate is higher than people perceive. On average 12.5% of women who know the are pregnant have a miscarriage within the first 23 weeks of pregnancy.
GA7A5 TIL Lightning is five times hotter than the surface of the sun