There’s now solid, scientific proof that you should always order the bigger pizza. NPR’s Planet Money compiled data from over 74,000 pizzas from 3,678 different U.S. pizzerias to confirm once and for all that a larger pizza is always a better deal. It essentially boils down to this: Because a pizza is a circle, the area of the circle increases with the radius. Thus, a 16-inch pizza is actually four times bigger than an 8-inch pizza. Reporter Quoctrung Bui made an incredible interactive chart that exists over on the Planet Money site, but a screenshot is pasted below, just so you get the rough idea. So, order the big pizza. Science is on your side.

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