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TIL about the U.S. Air Force's doomsday weapon, SLAM. The rocket was designed to fly fast and low over the Soviet Union, dropping hydrogen bombs over predetermined targets while its unshielded nuclear reactor contaminated everything in it's path.

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0wrPN TIL at present, out of the world’s nearly 200 constitutions, three still include a right to bear arms: Guatemala, Mexico, and the United States; of these three, only the last (USA) does not include explicit restrictive conditions.
yQyLl TIL in 1934 Josef Stalin lost re-election to General Secretary of the Communist Party 292 against, and only 3 for. 290 of the votes were deleted from the official records, leaving him the winner by 1 vote.
neBj7 TIL about "The Works", a 3D computer animated film in production from 1979-1986 by Computer Graphics Lab. It was planned to be released as the first entirely 3D CGI film in the early 80s (predating Pixar's Toy Story a decade) and run for 90 minutes, though only 10 minutes are known to exist.
m1WBv TIL about the "Tokyo Tower of Babel," a proposed 10 Kilometer tall tower that was designed to house up to 30 million people and was intended to be built in Tokyo Bay. If completed, it would have been the tallest structure in the world, but it remains an ambitious concept.
9YPnB TIL Australian school authorities once accidentally gave a standardized history exam asking students to analyze a painting of the Bolshevik Revolution with a giant robot in the background. When apologizing, they promised "new guidelines governing the use of internet-sourced material in exams."