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TIL there is a book called "Foundations of Mechanical Accuracy" that explains the process of how to get current tools from nothing. [PDF]

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5VYpB TIL For production of 'The Bellboy ' (1960) Jerry Lewis was actor and director, so he invented a system of multiple cameras and monitors enabling him to act, review the performance, and reshoot immediately. Lewis received the Golden Light Technical Achievement award for the invention.
BgRRb TIL almost 70% of employed Saudi citizens work for the government, and many of those work for less than 1 hour per day.
p89Mp TIL that Heath Ledger prepared for the Joker role by going into complete isolation for 6 weeks in a hotel room with only a journal and comic books related to the script and Joker.
yQr9X TIL Hercules from "The Nutty Professor" is the real life brother of Weensie from "Old School"
XEaxr TIL Adult Nile Crocodiles only require 600-1000 kcal per day, less than half the daily calorie requirements of an adult human