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TIL The US National Solar Observatory requires a swimming pool’s worth of ice to be added each night into its tanks so coolant can be distributed through the observatory. The heat is intense enough to rapidly melt metal at the telescope mirror’s focal point

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via reddit.com

8eLlG TIL original Trek was cancelled after season 2, the Klingon ship model was made as merchandising, and then Trek was renewed for a third season, allowing the show to use the model which had not been created to be a series prop.
Wk8kd TIL actor Danny Trejo has the most on-screen deaths of anyone in Hollywood history, with 65. Followed by Christopher Lee (60), Lance Henriksen (51), Vincent Price (41), Dennis Hopper (41), Boris Karloff (41), and John Hurt (39).
PmdJ TIL The movie ‘Jaws’ was supposed to have a lot more shark in it. After experiencing daily technical problems with the mechanical shark, Steven Spielberg was forced to rewrite the script and focus more on the 'fear of the unknown’. It went on to become the highest grossing film of all time.
KYrmE TIL about Mal de Debarquement Syndrome (disembarkment syndrome), a neurological condition usually occurring after a cruise, flight, or other sustained motion event. It is typically diagnosed when a person reports a persistent rocking, swaying, or bobbing feeling while stationary.
xV8p5 TIL of Lisztomania, the obsessive fan hysteria surrounding the classical composer Franz Liszt. Admirers would fight over his locks of his hair, pull his carriage like horses, and carry glass vials of his old cigars and coffee dregs.