The magma erupted by the volcano shrank after cooling down, resulting in cracks, which tended to be hexagonal, and finally formed closely-packed hexagonal prism-shaped rocks. This is the most stable result of the internal forces of the magma.
Nature is ever-changing. If you look carefully, you will find that honeycombs, basalts, compound eyes of insects, bubbles, snowflakes… all have hexagons inside. Why does nature love hexagons so much?
The honeycomb changes from a circle to a hexagon
The design of the honeycomb is exquisite, and some even call it a miracle in engineering. It consists of many regular hexagonal cells of the same size. But the bee nest was not hexagonal at first.
The bees secrete beeswax from the abdomen, and then step out of the nest little by little. A large number of nests are arranged in contact with each other to form a honeycomb. The initial nest is actually circular, but then it is gradually softened by the body temperature of the bees and turned into a hexagon. The real master of architecture is nature, but why does the circular honeycomb end up becoming a hexagon instead of other shapes?
The hexagon makes the foam more stable
We can find the answer in the bubble.
When many bubbles gather into a piece of foam on a flat surface, you will find that some of the bubbles in the middle are squeezed into hexagons. The internal angle of a regular hexagon is 120 degrees. Research has found that a connection angle of 120 degrees is the most stable mechanical structure. When multiple bubbles are in contact, they squeeze and stretch each other, and finally form the most stable shape, that is, a hexagon with an internal angle of 120 degrees.
The same is true for honeycombs. The softened round cells are like bubbles. When they come into contact with each other, they are stretched and squeezed, and finally stabilized, forming a hexagonal cell