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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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kOAe4 TIL after a unit conversion snafu, Air Canada flight 143 ran out of fuel at 41k feet. The pilot, who flew gliders in his downtime, brought the plane down on an abandoned airfield which was being used as a racing circuit and everyone got out alive with only minor injuries.
awnAo TIL the first person ever to go over Niagara Falls in a barrel and survive was Annie Taylor on October 24, 1901. She hoped her feat would bring her fame and fortune but she died in poverty.
roO4 TIL former Miami Dolphins Fullback Robert Konrad fell overboard from his 38-foot boat and swam for over 16 miles to shore overnight. Suffering from hypothermia once reaching shore, he said it was “bittersweet” because he had no strength to walk.
wLlp1 TIL Hanako is probably the most famous koi fish ever in history due to her astonishing age. When Hanako died in 1977 she was believed to be 226 years old, making Hanako the oldest koi fish ever in the world.
kJ4AE TIL In the 1980s pharmaceutical giant Bayer discovered their blood clotting drug was tainted with the HIV virus. Instead of scrapping the drug and taking a loss they sold it to unknowinging countries in Asia and South America leading to thousands becoming infected.