St. Patrick’s Day usually conjures images of partying, Catholicism, Irish nationalism and, perhaps most famously, the color green: green clothes, green shamrocks, green beer and green rivers.

Bryan McGovern does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Of the four main eye colors (brown, blue, green, and hazel), the rarest eye color is green. However, new classifications say another color is even rarer: gray. Brown is the most common worldwide, ...