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TIL that agriculture workers in early 20th century California were often forced to use "short-handled" hoes so supervisors could easily spot when they stood up to rest, despite contributing to severe injury. Thanks to Cesar Chavez and the UFW, its use was prohibited in 1975

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v10gD TIL about the Hummingbird hawk-moth, which are often mistaken for hummingbirds because of the similar way that they hover and feed.
E1mLP TIL Tupper’s self referential formula is an inequality that plots anything you can fit in a 106x17 pixels rectangle in a certain interval on the Y-axis. As a consequence, we can state that for every one of us there is an interval where the formula plots our name and the date of our death.
BrwmK TIL: Bloomers, the short gym bottoms worn by Japanese girls in Anime and manga, were largely phased out IRL in favor of unisex longer-legged shorts in the 1990's after a student protest at one school over the shorts attracting "unwanted attention" spread nationally.
ne4aP TIL When vaccines and similar treatment were first introduced in the 18th century, religious leaders condemned them, saying that diseases are sent by God to punish sinners. To try to cure sinners would be going against God’s will.
v1VQK TIL that Gordon Ramsay has chosen not to give his children a large inheritance, does not take them to expensive restaurants (not even his own), and does not allow them to sit in first class on planes so that they are not spoiled.