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TIL that the buildings inside the Cheyenne Mountain Complex (where NORAD is located) rest on giant half-ton springs to absorb the shock of earthquakes and nuclear attacks.

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via reddit.com

e0An TIL that on the 30th anniversary of Pacman, when Google changed their logo to a playable version of Pacman. Companies reported a drop in productivity and around 4.8 million hours of work productivity was lost that day, as a result there was an estimated loss of $120,000,000 worldwide.
6Ejaw TIL Alcatraz's prison guards created the myths about man eating sharks and deadly waters of San Francisco to discourage prisoners from escaping. There is only one recorded shark fatality in San Francisco in 1959
7r5pp TIL about a golf course that straddles the Swedish/Finnish border. Hitting the ball from the tee on the sixth hole means your ball will technically fly for just over an hour, as it crosses the time zone between countries.
lvRV TIL that a high school student absent due to a doctor’s appointment ended up locking his school down and getting held by the police after the receptionist calling him to confirm his absence thought the Fresh Prince of Bel Air theme song was a bomb threat
v1YZL TIL Bjarni Herjólfsson, a 10th century Norse explorer, was the first European to sight North America in 986 while blown off course for Greenland. Despite begging from his crew to explore, he refused to stop and look around. He was later criticized by King Eric of Norway for his lack of investigation