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TIL There is a network of colleges that advocate the use of open licensed textbooks with professors adopting these books into their curriculum. As more textbooks are adopted, eventually students will less likely have to buy textbook for their courses in the future

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5Ojn TIL there is a 1500 foot long spiral coil jutting into The Great Salt Lake that is only visible during droughts and has only been visible on three occasions since it was built in 1970
9YRpX TIL During WW2, the US created information material for its white soldiers about to be stationed in Britain, warning them that they would have to cope with black soldiers joining them in pubs. "It might not happen at home, but the point is, we are not at home".
wLZvE TIL that in 1999, 40 million people suddenly lost power in the Philippines, igniting fears of a possible military coup, only to find out that the cooling pipes of one power grid had sucked up 50 dump truck’s worth of jellyfish which caused the outage.
WalX TIL that Slovakia and Slovenia are mistakenly thought to be each other so often they meet once a month to exchange wrongly adressed mail
b6lDE TIL some weather balloon instrument packages contain prepaid mail bags, so if you find them you can post them back to the National Weather Service!