And four-leaf clovers may come in handy—but there's one thing to know before you run out onto your lawn in search of a lucky ...

Is this a rare find or a common shamrock ... Mostly, the four-leaf clover is not a separate species, just a genetic anomaly. That's why people feel so lucky when they stumble across one.

One thing that makes the four-leaf clover a lucky charm is its rarity. The chances of stumbling across one are typically about one in 10,000—much less likely than seeing a shamrock. And why is ...

Try your hand at this new puzzle by Gergely Dudás, aka Dudolf! In this St. Paddy's puzzle, your task is to find three ...