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TIL that most Japanese schools don’t have janitors. Instead, the children do the cleaning daily as part of the practice rooted in Buddhist traditions that associate cleaning with morality.

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neG9P TIL: The first synagogue built in America was built by philanthropist and slave trader, Aaron Lopez.
J1yy1 TIL computer servers are getting so hot and cooling them emits so much carbon (as much as the aviation industry), manufacturers are dunking servers into nonconductive liquid tanks to cool them and help their clients meet power usage effectiveness regulations
LQepr TIL the CEO of Live Nation (and Ticketmaster) makes $139 million/year.
N7e58 TIL Despite the term 'blood donation', the blood market is actually a multi billion dollar industry and blood given for free by donors is then sold on the open market for profit for as much as $600 per pint, a cost passed down to patients.
DQ4PD TIL Women used to dominate the beer industry but were forced out during the reformation as men spread rumors about them using witchcraft. Many brewed in secret in the woods after laws were passed prohibiting them from brewing. Much of the iconography of witches comes from this period.