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TIL because electronic computers were not fast in 1959, the X15 experimental jet used a Fluidic Digital Computer that used water instead of electricity. It featured hypersensitive Fluidic Integrated Circuits and Logic Gates that could make course corrections faster than its contemporary computers.

Read more ntrs.nasa.gov

via reddit.com

dD7ZK TIL that cartoonist Charles Schulz wanted to call his comic strip "Li'l Folks", but had to use the title "Peanuts" instead for trademark reasons. He always hated the name, which he described as "miserable", and he complained that "it has no dignity and it's not descriptive".
DyMD TIL that the hole at the end of the human penis is called a “meatus”.
7rVx7 TIL the New Cult Awareness Network is owned and operated by the Church of Scientology after they sued the original organization out of existence in 1996.
MeYLm TIL Daniel Craig has an uncredited cameo appearance as a stormtrooper in 2015's The Force Awakens.
mMxx TIL that rice does not need to be grown in water, but since it can survive it, it is done so that weeds and other pests can be controlled, leading to higher yields.