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TIL Galileo tracked sunspot movements and discovered that the Sun rotates. It is now known that sunspots close to the equator rotate once each 25 days and sunspots near the poles rotate each 38 days

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ep01b TIL The Phoenix Suns had no official mascot until a fan came to a home game dressed as a gorilla. As he left, security suggested he dance underneath the basket during a timeout, and the crowd loved it. The fan kept coming to games until he was officially invited to be part of the team.
Wk4Zd TIL that in November of 1999, Kevin Smith attended a protest against his own movie: "Dogma." He even made it onto the local news, when the on-the-scene reporter asked him (not knowing it it was him) his thoughts on the movie. He responded: "I don't know, but I've been told, 'not good.'"
mx1Np TIL One of the most famous cartographic errors in history showed the Island of California separated from mainland N. America by the Gulf of California
NXVL6 TIL the Wayne Gretzky trade from Edmonton to the LA Kings yielded a "Trade Tree" that lasted 34 years (i.e. the players and draft picks Gretzky was traded for in 1988 spawned their own trades and draft picks over the years, with the final player leaving the NHL before this current season.)
R7o94 TIL that in 1915, surrounded and faced with imminent defeat, the entire Serbian army and government, numbering 400,000 (~10% of the population), retreated through Albania to the sea and evacuated to Greece. Half of them died on the march, but the rest came back in 1917 to liberate their country.