The helix is a wonderful line. Just like a corner, its shape will not change whether you enlarge it or shrink it. We can often see its beautiful figure in nature. Of course, the most typical spiral is snails on land or various conchs in the sea. They are authentic snail "fans", with the word "snail" in their names and snails in their shells.
Morning glory vines like to climb by rotating to the right, which is mathematically called clockwise rotation. Most of the spiral climbing plants are right-handed, and a few plants are left-handed. For example, the vine of Schisandra chinensis is left-handed. There are also a few plants that "open their bows left and right" and have no fixed position. For example, when a grape climbs a shelf, its tendrils just twitch from side to side, which is irregular.
Morning glory vines like to climb with their right hands.
Sunflower seeds are spirally arranged on its disk; The leaves of plantain seeds are not only arranged in a spiral shape, but also have an included angle of137 30'. Only in this way can each leaf get the most sunshine, which is conducive to good ventilation.
Horn and snail shell are even more wonderful. The geometric order of their proliferative tissues is a standard logarithmic spiral. The shells of these two animals are partly old and partly new. The new part grows in the old part, and each new part is multiplied strictly according to the original logarithmic spiral structure and never changes, forming the shape of logarithmic spiral.
In life, we can not only see the solidified spiral, but also observe the dynamic spiral.
As soon as the moth saw her mortal enemies, such as dragonflies and bats, she immediately spiraled, and the enemy was dizzy by it, so it was naturally not easy to catch; A spider staying on the surface of the cylinder will catch the fly staying on the surface of this net, and it will not rise along a straight line, but along a spiral line; Bats fly down from a height and follow the path of a conical spiral. From the point of view of our galaxy, all the surrounding stars spiral outward around the center of the circle. It seems that both plants and animals, behemoths and molecules invisible to the naked eye like spirals.
Under the microscope, we can see that the geometric shapes of sugar molecules are all right-handed. In recent years, some people have synthesized levosaccharide. This kind of sugar tastes sweet, but it doesn't produce heat. Because our body only accepts glucose existing in nature and doesn't understand levoglucose, it is not "cold". Therefore, levoglucose is undoubtedly a kind of gospel for diabetics, which can satisfy their desire to eat sweets without being digested and absorbed by the body. Each of us has a curl of hair, and some people have two or more. Some of this rotation is left-handed and some is right-handed. Why do you want to grow into a spiral? It turns out that this is the "wealth" inherited by our ancestors. It can make rain drop in a certain direction, just like putting on a hemp fiber; But also easy to make the hair closely arranged, so as to avoid the bite of harmful insects. Some people think that this can play a good role in heat preservation.
Many creatures like spirals.