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TIL that the earliest-living historical person known by name is Iry-Hor, a predynastic pharaoh who ruled over Upper Egypt in around 3200 BC. His dynasty is regarded in Egyptology as 'Dynasty 0' - the first out of 30 dynasties that reigned over Egypt.

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loD6A TIL that because the UK Royal Navy's Astute class nuclear powered submarines can purify their own air and water and run on nuclear fuel, that the endurance is only limited to 90 days due to breakfast storage capacity for 18,000 sausages and 4200 Weetabix
9YQVr TIL that the lethal dose of chocolate for a human is 22 lbs, or 40 Hershey Bars.
mwgY TIL that before “Video Game Violence” in real life, there was “Board Game Violence” that was a ‘problem among teens’
6EQym TIL Paro Airport in Bhutan is so dangerous that only eight pilots are qualified enough to land there. (Pilots maneuver between mountains, fly within feet of houses, and land on a narrow, 6,500-foot runway.)
R7Now TIL Dexter Holland, lead singer of punk band The Offspring, was a doctoral candidate for a PhD in molecular biology, but left before graduating as his music career was blossoming. He eventually returned to the University of Southern California to finish his degree, which he was awarded in May 2017.