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TIL in the US radio-controlled clocks precisely coordinate time shifts with the official atomic clock at the Physical Measurement Laboratory in Boulder, Colorado. The atomic clock keeps time for the entire country and will neither gain or lose a second over the course of 100 million years.

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LZdv TIL that in The Simpsons episode “You Only Move Twice”, Albert Brooks ad-libbed most of Hank Scorpio’s dialogue. The end result was two hours of dialogue for Hank.
mx4Ax TIL about the culture of suicides on the Golden Gate Bridge; in a study of survivors--after 26 years--over 90% polled were still alive or had died of natural causes; nearly every survivor says they regretted jumping immediately
e0GEn TIL that when Bobby Pickett finished the demo of "Monster Mash" in 1962, it was rejected by every major music label. Finally a willing producer was found, and it hit #1 on the Billboard charts, went gold x3 its first week, and has charted in multiple years since.
dDM4E TIL that in 2012, the National Reconnaissance Organization (NRO) gifted NASA two space telescopes with capabilities exceeding that of the Hubble telescope. For example, the telescopes have shorter focal lengths, which in turn gives them a field of view that is 100x larger than Hubble.
16bAX TIL that there is a broom closet inside the Cheyenne Mountain Complex labelled "Stargate Command" in reference to the fact that the bunker was the fictional setting of the TV show "Stargate SG-1."