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TIL that modern windows are usually made from float glass which is a sheet of glass made by floating molten glass on a bed of molten metal of a low melting point, typically tin. This method was pioneered in the 1950’s by Sir Alastair Pilkington and Kenneth Bickerstaff.

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kOrDd TIL that, in 1931, Wayne Morse, a college professor, gave one of his students, Richard Neuberger, a D for the course. When Neuberger complained, he changed his grade to an F. Because of this, 20 years later, they would only communicate through angry letters as the two senators from Oregon.
R7eJw TIL Nikola Tesla was an ardent follower of Vedanta and frequently used Sanskrit terminology in his works. His meeting with the Hindu monk Swami Vivekananda in 1896, facilitated by actress Sarah Bernhardt, triggered his lifelong interest in the Vedas and Indian philosophy.
mwrx TIL when asked about the attack on pearl harbour in 1941 Japanese Admiral Isoroku Yamatoto said “I fear all we have done is to awaken a sleeping giant and fill him with a terrible resolve”
QJw6X TIL about Rubble Woman, who, in the aftermath of World War II, helped clear and reconstruct the bombed cities of Germany and Austria. With much of the male population dead or prisoners of war, this monumental task fell to a large degree on women.
yQkDw TIL Japanese police wear white gloves since the Beatles’ visit in 1966 when the responsible police chief decided to add a layer of propriety between police officers' hands and crowds of mostly young women