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TIL that Matt Patricia is the only rocket scientist coaching in the NFL. Before coaching, he was a working aeronautical engineer who graduated from RPI: a school whose fight song includes "sin", "cosine" and "tangent", as well as six digits of pi.

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8a8AK TIL that the St. Patrick's Day tradition of dyeing the Chicago river green arose by accident when a group of plumbers used green dye to trace illegal substances that were polluting the river. The dyeing of the river is still sponsored by the local plumbers union.
6ZaW TIL An officially recommended solution to a common problem with the Apple 3 was to “lift the computer two inches and drop it”
kOMJ1 TIL By launch day, Apollo 11 Command Module Pilot Michael Collins accumulated 400 hours in a command-module simulator, running emergency scenarios and rehearsing every step of the journey
VBKn4 TIL that India's name is based on Indus River which flows through Pakistan.
dbn7 TIL the hit show “To Catch A Predator” was cancelled in 2008 because an assistant to the Texas DA office shot himself after he was caught talking to and exchanging pictures with a decoy posing as a 13 year old boy.