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TIL the Australian language Ngan'gi (Ngan’gityemerri) has more than fifteen genders, including masculine human, feminine human, vegetables, drinks, canines, non-canine animals and two different genders for spears

X0YJ6 TIL that Ford's Theatre -- site of Abraham Lincoln's assassination -- was afterward converted into an office building. In 1893, three floors collapsed killing 22 clerks and injuring 68 more. It was restored as a theatre in 1968.
XexD TIL after reading newspaper accounts of a family dying after their refrigerator leaked toxic gas into their home, Albert Einstein and a student invented a refrigeration system with no moving parts. Now known as the Einstein Refrigerator, modern refinements may see it soon hit the market.
OmBX TIL that 7 of the top 10 drunkest US cities are located in Wisconsin, and Wisconsin lays host to 12 of the top 20 drunkest cities.
J1XQ4 TIL that the idea that medieval castles had clockwise spiral staircases to make it hard for attackers is mostly unfounded. Not only did about 30% of medieval castles have counter-clockwise stairs, the earliest known reference for this claim comes from a book written in 1903, with no primary sources
GYZGN TIL about Ben's Game. Ben Duskin was a Make-A-Wish kid with leukemia, and his wish was to develop a game about fighting cancer. After getting several offers, Ben worked with Eric Johnston, a software engineer from LucasArts. The game was finished and made available for free in several hospitals.