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TIL college textbook prices have risen 1000% since 1977.

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ADMB4 TIL of Distichlis palmeri, a grain plant with a high salt tolerance. Until recently it was thought to be extinct. But a breeding program of the remaining plants has bred varieties with yields of 2 tons per hectare, and is a strong candidate to become a major global food crop.
A4vx TIL in 1949 actor Kirk Douglas was questioned in the disappearance of actress Jean Spangler, a recent costar and three months pregnant, after her purse was found with a note addressed to “Kirk” reading “Can’t wait any longer, Going to see Dr. Scott. It will work best this way while mother is away.”
E1KQw TIL that in 1910 spectroscopic analysis of volatile gases in the tail of Halley's Comet caused panicked buying of gas masks and quack "anti-comet pills" and "anti-comet umbrellas" by the public.
e0DwJ TIL that rye and oats used to be considered weeds in wheat fields. Because they would get weeded out if they didn't look like wheat, they also evolved to have large seeds. Eventually, their hardiness compared to wheat meant they were grown as food in colder climates.
ep4aJ TIL spectators can be penalty carded in the sport of fencing