The thing that strikes you immediately when visiting a baseball stadium for the first time is the grass. Trimmed to perfection, it sports stripes, diamonds, a checkerboard, or even arches. Over the years I heard many theories about how they’re created. The grass is colored, has different lengths and so on…but the real reason is a lot simpler. It’s the direction of the blades that tints the grass in different shades. When the sun hits a perpendicular blade, its whole body reflects …
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