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TIL In China more than 40 million people live in caves

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78laX TIL the 2005 NASA Authorization Act established the ISS National Lab on the US segment of the International Space Station. This act opened up the station for academic, private and government access to many of the space stations research facilities.
KOn8R TIL bird brains pack neurons much more densely than mammals allowing some birds to have a total brain cell count comparable to primates
LenV TIL that the Canada-Denmark Territorial Conflict over Hans Island escalates to Danish military going there and leaving a bottle of schnapps and a sign proclaiming “Welcome to the Danish Island” and then Canadian military forces leaving a bottle of Canadian Club and a sign saying, ‘Welcome to Canada"
X0ZER TIL For thousands of years, syilx people and other Canadian First Nations have been visiting a sacred medicine lake with 365 naturally formed “spots”. A non-Indigenous man once wanted to convert it into a spa but First Nations took back possession of the lake and permission is required to visit
wox57 TIL because the Magna Doodle uses no ink or graphite, it is used by scuba divers as an underwater whiteboard when instructing students