What is this close-up picture? (WotsThat: Dried mud crack pattern)

Question

What object is shown in this zoomed-in close-up photo?

GravityFox · Accepted Answer

Dried mud crack pattern. Dried mud cracks follow a mathematical rule called the "crack pattern optimization principle," where the mud naturally breaks into roughly hexagonal shapes to minimize the stress energy released during shrinkage—the same principle that creates honeycomb structures in beehives and the basalt columns of the Giant's Causeway. Scientists can actually predict where and how mud will crack by measuring its composition and drying speed, making these seemingly random patterns surprisingly precise and predictable.

Answer: Dried mud crack pattern

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