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TIL Astronaut Neil Armstrong was the only professor at the University of Cincinatti that did not have a doctorate, although he earned his Master’s by giving a presentation on aspects of the Apollo 11 Mission

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rRkKM TIL The Mandarinfish is one of only two species in the world which can produce its own blue coloring. Other animals that appear to be blue such as peacocks, don’t actually produce a blue pigment, they have colorless cells which reflect light to make it appear blue.
xVX47 TIL that during Hiroshima, the Gingko trees that were growing 1 to 2 km from the explosion of the atomic bomb survived the blast and quickly became healthy again. Those trees were some of the few living things that survived and are still alive today.
4Xbkb TIL: Naomi Parker Fraley was the most likely inspiration for the WWII poster, "We Can Do It!" The image is thought to have been inspired by a photograph taken of Fraley, operating a machine-tool at the Navel Air Station Alameda, where she worked on aircraft assembly. Fraley died in 2018, aged 96.
W7xjo TIL that that in 1982, during the 80's Satanic Panic, Rep. Robert Dornan introduced a bill that would forbid backward messages on music albums. It failed to pass.
nWXxo TIL the BIPM doesn't use a physical rod that's exactly 1 metre similar to the physical "Kilogram" specimen, instead use concise measurement of light & time defined in 1984 by the CGPM as the distance light travels, in a vacuum, in 1/299,792,458 secs with time measured by a cesium-133 atomic clock.