pizza

The math of why bigger pizzas are such a good deal is simple. A pizza is a circle, and the area of a circle increases with the square of the radius.

So, for example, a 16-inch pizza is actually four times as big as an 8-inch pizza.

And when you look at thousands of pizza prices from around the U.S., you see that you almost always get a much, much better deal when you buy a bigger pizza.

It was only a matter of time really.

Forget frozen pizza; science has finally created a slice that can last three years on the shelf before going bad.

No, it's not DiGiorno. It's a ready-to-eat meal — known as a MRE — created for the military. In combat zones where field kitchens are not an option, soldiers rely on these meals, which don't need to be refrigerated or frozen.

We all wish this was real.

It's the tastiest equation there is.