› added 6 months ago

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TIL that traditional Japanese sword forging techniques produced a uniquely layered steel microstructure that was key to the legendary balance of sharpness and resilience in samurai swords

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pYZDO TIL About a power plant turbine bearing at Holtwood Hydroelectric Power Plant that has been operating maintenance free for over 100 years and rated by the ASME (American Society of Mechanical Engineers) to continue operating for another 1300 years without maintenance.
WKXo TIL NASA has 2 satellites chasing each other around the Earth tracking the distance between themselves. Their nicknames are Tom & Jerry!
wrX8 TIL when the Beatles wrote the song “With a Little Help from My Friends”, the first line ended with ‘What would you think if I sang out of tune? Would You Throw Ripe Tomatoes at Me?’, but Ringo changed it so that fans would not throw tomatoes at him should he perform it live.
kJ4wE TIL the "metals of antiquity" are gold, silver, copper, tin, lead, iron, and mercury.
VM5OD TIL that on April 20, 1979, then President Jimmy Carter, was fishing in the middle of a lake in Georgia when a rabbit swam up to his boat and tried to get in it before he scared the rabbit off.