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TIL that the movie "Jaws" used an engineless, fiberglass boat that could "sink on command" and resurface. The Orca II was a replica of the wooden Orca, a real boat used as Quinn's shark hunting ship at the end of the film. Pneumatic tubes tipped barrels mounted below Orca II to fill up and sink it.

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d84v9 TIL: Pennsylvania makes 80% of US pretzels
rQ8o TIL a failed experiment of an 18 year old English chemist in search of a treatment for malaria in 1856 produced one of the world’s first synthetic dyes for the color purple, which severely impacted economic trade as some natural dyes were major commodities more valuable than silver or gold
e0eb TIL: Europa(one of jupiter’s moons) may have more water than Earth
DGYY TIL When last names were created in Thailand in 1913 law required all names to be unique. Because of this, the only way two Thais would have the same last name would be if they were related.
epEXJ TIL the diffusion of responsibility is the phenomenon where individuals in a group are less likely to take action or feel responsible, assuming others will do so. This often leads to inaction in situations where help is needed.