This article was originally published on Petsreporter.com

Have you ever given any thought to the expiration date of chips or the origin of high-fives? Some facts are very important and interesting to learn… and then there are useless facts that have no point but somehow make you question everything. Both types of facts are fascinating! Useless facts, specifically are incredibly fun to browse through, as you never know what you might learn. While completely random and unquestionably useless, these are the types of facts that make one admire the universe and humanity – and they’re great as conversation starters! If nothing else, these are the types of facts that are great to read when you need a little laugh.
#1: The Real Color of a Pitch-Black Room
Ever open your eyes in the middle of the night, in a pitch-black room, and wonder exactly what shade of black that color is? Or wonder if that color has a name? Well, maybe you haven’t, but it’s interesting to learn more about this color shade that is so prevalent in our everyday lives. Eigengrau is the color you’ll see if you open your eyes in a pitch-black room!

Eigengrau is often called either dark light or brain gray, which actually makes a whole lot of sense the more I think about it. This is both the color we see when we close our eyes, as well as if we open our eyes in a pitch-black room. We see this color because our eyes actually can’t see true darkness! So, the next time you open your eyes in the middle of the night, you’ll be able to really think on the shade of eigengrau you’re seeing. Or not.