At the foot of some of the tallest trees in the world, up on Humboldt Bay in the Redwood Forest, the small town of Eureka, California is celebrating its 150-year anniversary this summer. "Eureka!" of course, also happens to be California's state motto, appearing on the state seal since 1849. In Greek, "eureka" means "I have found it!" and probably refers to the discovery of "gold in them there hills."

But the original "eureka" was coined by the Greek mathematician, Archimedes, who, as legend has it, jumped out of his bathtub and ran naked through the streets of Syracuse shouting "Eureka!" after discovering the principles of density.

Archimedes is also the man whose experiments with circles led to the discovery of the constant: "pi" - Ï€, (or 3.14) "“ if you can remember all the way back to geometry class. Which leads us "full circle" back to Eureka, California, where, much to the locals' delight, a Marie Callender's bakery has recently opened. If you're headed north this summer for the celebrations, be sure to stop in and ask for a nice piece of pecan Ï€.