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TIL Walmart has a "Code Brown" that activates during a suspected mass shooter event. Associates are trained to help customers escape through certain exits or to hide. This code was issued during the 2019 El Paso Shooting and several employees were commended for their bravery by the US president.

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R5aka TIL Subconscious fidgeting may help you burn a significant amount of calories throughout the day. So basically, if you're a naturally fidgety person, it's easier for you to keep your weight in check.
gp5A TIL During the first successful Commando raid at Lofoten, Norway in WWII, the officer used the local telegraph office to send to “A.Hitler in Berlin,” the following message: “You said in your last speech, German troops would meet the British wherever they landed. Where are your troops?”
d8bKE TIL that the earliest known example of telephone technology in the Western Hemisphere was created 1,200 to 1,400 years ago by the Chimu people of Peru. It's comprised of two gourds connected by a 75-foot cotton-twine cord, similar to the soup-can phones children make today. It's in the Smithsonian.
X0kj TIL Canadian engineers wear an iron (or steel) ring on the pinky of their working/dominant hand as a symbol and reminder of the obligations and ethics associated with their profession.
R7EQ1 TIL that extensive use of research in the development and production process of Blue's Clues inspired several studies that provided evidence for its effectiveness as a learning tool. Field tests showed that the attention and comprehension of young viewers increased with each repeat viewing.