And by useless, I mean completely useful when you want to impress someone.
The YKK on your zipper stands for Yoshida Kogyo Kabushikigaisha.
A Blue Whale’s heart is so big that a small child can swim through the veins
The combination of an exclamation point and a question mark is called a "interrobang."
Via: expresident
When you yawn and stretch at the time you are "pandiculating."
Via: en.wikipedia.org