Fix your floppy pizza slice with Gaussian curvature

It turns out that folding a pizza slice lengthwise to improve its rigidity is a great example of the "Remarkable Theorem" by Gauss. Cliff Stoll explains.

Cliff includes oranges, bananas, and bagels to round out the food-based examples. Impress your friends next time you grab a slice. If only pizza rat understood math, he might have had an easier time on the stairs.

Numberphile (Mathematical Sciences Research Institute)