Here’s what you’ll learn when you read this story:Mathematical evidence indicates that our universe is flat, but it could be infinitely big, as well. In fact, all evidence indicates that our universe is as flat as can be, even as it could be infinitely big. That means the universe is flat and is expanding faster and faster, a bizarre combination of circumstances that we thought couldn’t exist! So, in a flat universe where light rays stay perfectly parallel and triangles add up to 180 degrees, the splotches should be the same size as we predict. But again, we do not know—and perhaps can never know—the true extent or shape or structure of the universe.