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TIL Measured by its longevity and popularity, the Cessna 172 is the most successful aircraft in history. First produced in 1956, more than 44,000 had been made as of 2015. It holds the world record for the longest manned non-stop flight of 65 days, set in 1959.

rany TIL that the tomb of China’s first emperor has never been opened because of fears of booby traps and extreme levels of mercury, showing that legends of rivers of mercury flowing in the tomb may be true.
0wAnj TIL in 1981 a man named Roger Fischer had an idea for a volunteer to have ICBM launch codes put in their chest cavity. In the event of an emergency, the volunteer would carry a knife to be killed with. It was meant to force the personal killing of one man to start the impersonal killing of millions.
ox7E TIL if all the corn and soybean production in the U.S was diverted to corn ethanol and soy biodiesel, it would meet only 12% of gasoline demand and 6% of diesel demand.
1aYjr TIL when Monkee Michael Nesmith offered his song "Different Drum" for the group, the producers of their TV show, who had control over the material, turned it down, it would go on to be one of the first major hits for singer Linda Ronstadt and her band the Stone Poneys
wLe1P TIL Philip Seymour Hoffman didn't want his children to be "Trust Fund Kids" so he didn't make a trust for them, which resulted in a $12 million tax bill that he could have avoided if he made a trust and exercised proper estate planning.