What’s a little-known but obvious fact that will immediately make all of us feel stupid?

Reddit:

The caps of most cheap pens have holes in them so you can still breathe even if you accidentally swallow the cap.

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”).

The founding fathers of America pretty much all died before the first documented discovery of dinosaur bones in 1812. I always tell people George Washington didn’t know about Dinosaurs during his lifetime and that will get people thinking.

Do not click on this Reddit link unless you’ve got a lot of time to waste.