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TIL in 1951, Dr. W Grey Walter built a "tortoise" robot that can detect and move around obstacles and "see" by going towards or away from bright light, and return to its charging station when the battery charge is low.

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d8nZ9 Today I learned that chocolate milk was originally made as a medicine
j6EpM TIL that the Danish word for "Pimp" is "Alfons," after the protagonist in the play Monsieur Alphonse by Alexandre Dumas, fils. As a result, although "Alfons" is the name of a popular children's book character, the name remains very rare. As of 2016, only 8 people were named "Alfons" in Denmark.
epkkE TIL that a little girl stopped growing at the age of 2. The doctors termed her condition as Syndrome X. She died at the age of 20, with the body of a 2 year old and the mentality of a 9 to 12 month old.
Me7Z8 TIL that the World Bank stopped tracking inflation in Zimbabwe in November 2008, when it reached 79.6 billion percent. One year later, the country abandoned its currency. The exchange rate at the time was $35 quadrillion Zimbabwean dollars to $1 USD.
nWJOb TIL German actor Klaus Kinski was so difficult to work with filming the 1986 movie "Crawlspace" the director later made a short documentary called "Please Kill Mr. Kinski" about the whole mess, claiming Kinski received death threats from the crew and producers over his antics on set.