› added 9 years ago

233

TIL that carrying Arabic flashcards is considered a valid reason for arrest in a US airport.

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via reddit.com

Z4OG TIL the water-repellent properties of NeverWet spray can be used to create ‘invisible ink’ street graffiti that only shows up in the rain
4AZR TIL that nurses and doctors wear green or blue scrubs to help relieve eye strain from constantly looking at red (patient’s insides), which is also opposite on the color wheel. They’re easier to wash and keep longer.
LQkrP TIL - In 1956, the Marine Corps' AD-4B (A-1) Skyraider had a "relief tube" for pilots to urinate, but no provision for #2. An aviator on a 4 hour flight needed to take off his helmet, and poop into it.
epRRg TIL about the Hiller Flying Platform, a 1950s hoverboard.
4X5JJ TIL Kodak uncovered the first atomic bomb test when customers began complaining about black spots on their photos