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TIL shellac is made from secretions of the lac bug, has been used for almost 3000 years in finishes and resins/adhesives, and us UV resistant. It is nontoxic and is the ingredient that gives a shiny finish to many foods!

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awDMo TIL Unit 731 in the Japanese Army undertook lethal human experimentation during WWII, not publicized because the U.S. secretly granted immunity to the physicians in exchange for research on biological warfare and data from human experimentation.
Lb8Q TIL Six major orgs. (American Psych. Association, Am. Academy of Peds., Am. Medical Association, Am. Acad. of Child and Adolescent Psychiatry, Am. Acad. of Family Physicians, and Am. Psychiatric Association) recommend no electronic media at all for children via http://ift.tt/1AOMu4n
ljN TIL reddit is worth $152 million and growing.
6EMd8 Hong Kong-based students, Sum Ming Wong and Kin Pong Li designed a door handle that uses light to always keep itself sterilized. The students were inspired by the SARS outbreak in the 2000s and figured that a self-sanitizing door handle is more effective than the chemical-based cleaning processes we are using right now. The handle is made of a glass tube with aluminum caps at each end and the entire handle is covered in a powdered photocatalytic coating made from a mineral called titanium dioxide. The bacteria is decomposed through a chemical reaction that is activated by UV light reacting with the thin coating on the glass tube.
rNdJd TIL John Madden, the football coach, did not in fact create the Madden women’s shoes brand