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TIL that the Boiling Frog Apologue (A frog will jump out of boiling water but not tepid water being graddually heated) is based on a 19th century experiment on dead frogs. Living frogs will jump out of water that becomes too hot, and immediately die if placed in boiling water.

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l7dK TIL That, to prove that stomach ulcers were caused by bacteria and not stress, a scientist drank a beaker of the bacterium. He both developed stomach ulcers and won the Nobel Prize in Medicine.
enX5 TIL The cat with the Guinness Record for Loudest Purr was measured at 92dB or louder than a lawn mower
69oBW TIL gorillas were once considered cryptids and were described as human-like monsters until 1847 when it formalized as a new species.
rLXM TIL Staples, Office Depot, and Office Max are all the same company. Office Depot and Office Max merged in December 2013 and Staples bought the combined company in February of 2015.
DOMv TIL James Earl Jones was a functional mute for 8 years due to a stutter he had developed as a child. He credits his English teacher, Donald Crouch, with helping him end his silence. Crouch believed forced public speaking would help Jones gain confidence and insisted he recite a poem every day.