An intriguing list of “little-known but obvious facts”.
The word “helicopter” has two components. They aren’t “heli” and “copter”. They are “helico” and “pter”. “Helico” (helix) and “pter” (wing, like with “pterodactyl”)…
u/TikiTC asked on r/askreddit: “What’s a little-known but obvious fact that will immediately make all of us feel stupid?” Many of the 20,000+ replies are funny, useful, and fascinating
[Mark Frauenfelder/Boing Boing]