› added 1 year ago

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TIL that our blood is red because it is rich in iron. Some animals have blue blood because it is rich in copper.

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PVZZ TIL that “RPG”, when used in reference to the RPG-7 weapon, does not stand for rocket propelled grenade. Instead, it is a Russian acronym for Ruchnoy Protivotankovyy Granatomyot, roughly translated as “hand-held anti-tank grenade launcher”
a8Veb TIL - There exists a The Rainbow Connection cover from The Carpenters, but it wasn't released until 2001 by fan request, because Karen Carpenter thought it wasn't good enough, and most Carpenter fans don't even know it.
Wkvnd TIL the QWERTY keyboard layout probably allowed early typewriter salesmen to impress their customers by being able to easily type out the example word "typewriter" without having learned the full keyboard layout, because "typewriter" can be spelled purely on the top row of the keyboard.
d89Or TIL that the Boeing B-29 Superfortress airplane (WW2, Korean War) had an analog computer system that allowed one team to simultaneously control 4 turrets mounted on the bottom of the wings — the computer calculates the aim and automatically adjusts all of the turrets respectively
jNQAn TIL The year that Lord of the Rings author, J.R.R. Tolkien, died is rather unique. He died in 1973, that number may sound familiar: 1 ring to rule them all, 9 rings for men, 7 rings for the dwarves, and 3 rings for the elves!