Four-leaf clovers have long been held as a symbol of good fortune. Learn why they're so rare (and why Saint Patrick used three-leaf clovers in his teachings) in this episode of BrainStuff.
Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

BrainStuff Classics: Why Are Some Americans Cancelling Columbus Day?
07:16

American Versus British English: What Are Biscuits, Muffins, and Pudding?
09:51

How Do Sunspots Work?
14:22