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TIL lenticular lenses make good DIY "invisible cloaks"

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lGXG TIL that 3 people died while in a flight simulator in a flight safety building, due to a plane crashing into it.
GYpYj TIL that Albert Hoffman, the discoverer of LSD, dosed himself at exactly 4:20pm on Apr. 19, 1943, and then went on a bike ride.
74RZ TIL the siphonophorae are animals that appear to be one organism but actually consist of a colony of highly specialised individual animals called zooids
XEPAj TIL the human Coronavirus causes approximately 15% of cases of the common cold
9wdDB TIL that David Lee Roth, former vocalist of Van Halen, is a also a state-licensed emergency medical technician in New York. In 2012, he said: "I probably have over 200 9-1-1 calls on my ticket in the last six years alone. I live a very different life away from music."