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TIL GPS was opened up for public use in 1983 by Ronald Reagan following a Korean Airlines flight being shot down after wandering into Soviet airspace

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NXYlb TIL: There's a Planet Where it Rains Molten Glass Sideways at 5,400 mph
4566 TIL that an Australian family used a large black crystal as a doorstop for over a decade before realizing that it held a 733-carat black sapphire, the Black Star of Queensland
YOm7 TIL: A teen in Michigan built a working nuclear reactor. He taught himself how to build it as a weekend hobby project in his basement from ages 15-17 for $3500.
weOJ TIL Jimi Hendrix covered “Sgt. Pepper” in front of The Beatles only 2 days after it was released.
69bAW TIL that Thomas Derrick was one of 24 sailors sentenced to death after sacking a city, but the Earl of Essex spared him on the condition that he execute his comrades. Derrick went on to become a professional executioner, killing over 3,000 men over his career, including the Earl of Essex.