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TIL Burger King’s New French Fries Took Ten Years to Develop

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e0QKJ TIL That the Kauai' o'o's song was recorded before it went extinct in 1987. It captures the voice of the last known bird, a male, singing a duet and pausing for the female to respond. These birds mated for life.
9wDvX TIL when Guinness World Records stopped monitoring the record for the longest time to stay awake in 1997, the record holder at the time was Robert McDonald who went 453 hours 40 minutes (18 days 21 hours 40 minutes) without sleeping in 1986.
jN0Ka TIL that 25% of the bones in your body are in your feet.
QJ7wL TIL in Japan it is considered rude to tip staff at restaurants, as it's considered an act of pity
Ar1B TIL In 1900, a German mathematician outlined a list of 23 unsolved problems in mathematics that he hoped would be solved in the 20th century. As of 2015, only 10 have been answered.