If you are a conscientious person, you will find that in life, examples of using spiral lines abound.
Many combinations of bottles and lids rely on screws; To open a bottle of French dry red, you must use a tool with a spiral line; When you go to the playground on holidays, you will find that children are very interested in the high spiral slide, and the spiral track is the spiral; Rifles in the gun bore, taps, pens, flashlights, and screws, screws, nuts and other connectors and fasteners on bicycles are also inseparable from screws.
As early as 2000 years ago, the ancient Greek mathematician Archimedes studied the spiral line. 1638, the famous mathematician Descartes first described the logarithmic spiral and listed its analytical formula. This spiral has many characteristics, the most prominent of which is its shape. Whether you zoom in or out, it won't change, just as we can't zoom in or out.
This spiral is widely distributed in nature. An ant crawls outward along the radius in the center of a record rotating at a constant speed, and the ant itself describes a spiral line; Spiders parked on the surface of the cylinder will pounce on mosquitoes on the surface of the cylinder, and its best path on the surface of the cylinder is also a spiral line; Bats fly down from a height, but they follow another spiral path in space-conical spiral. Even the orbit of a star is spiral.
After observing and studying the gas density in the middle of the Milky Way for three years, Dr. Naoki Nakai of the National Astronomical Observatory of Japan believes that the Milky Way is spiral, that is, the stars spiral outward around the center of the circle.
If you pay attention, you should know that the vines of morning glory always rotate to the right and climb. Scientifically, this right turn is called "clockwise". The leaves of plantain are also spirally arranged, and the included angles between them are 137 degrees, 30 degrees and 38 degrees. This arrangement of blades can make the same blades get maximum lighting and good ventilation.
In fact, the arrangement of plant leaves on the stem is generally spiral. In addition, the arrangement of sunflower seeds on the plate is also spiral.
Like snail shells, the geometric order of their proliferating tissues is actually a standard logarithmic spiral. Strangely, every new part of them proliferates in strict accordance with the original logarithmic spiral structure and never changes, just like the earth rotates around the sun in a fixed orbit.
Human hair grows obliquely from the main hair bag and forms a vortex shape in a certain direction, which is called hair spin, which can be divided into right-handed and left-handed ones. In fact, a hairpin is a hairpin that grows on the body surface and allows hair to grow in a certain direction. In wild mammals, hairpins have the function of protecting themselves and adapting to the environment. It can make the rain disappear in a certain direction, just like a layer of hemp fiber. They are closely arranged to avoid the bite of harmful insects. In addition, it also has a good thermal insulation effect. Although these functions of human hair have degenerated to a negligible degree, their shapes have always been maintained.
In nature, there are some microscopic life spirals that can only be seen with the help of an electron microscope. Just like the sugar we usually eat, the molecular geometry of both sugarcane juice and beet juice is right-handed. In recent years, people have synthesized levo-sugar. Strangely, levo-sugar is sweet, but it does not produce heat. What is the reason? Scientists have uncovered the secret for us. It turns out that metabolic enzymes in our body only accept glucose that exists in nature.
In the human body, all amino acid molecules are left-handed, while starch molecules are right-handed. Deoxyribonucleic acid (DNA) is a huge molecule that transmits biological genetic information. It has the shape of a trapezoidal double helix and rotates to the right from the bottom to the top. Watson, who won the Nobel Prize in Medical Physiology, drew a molecular model of the double helix structure of deoxyribonucleic acid (DNA), which became one of the greatest discoveries in biological science since the 20th century.
Is there any internal connection between helix and biological growth? Why are there so many spiral objects in nature? Why can't it be other shapes?
Scientists can't explain yet. They explore the spiral of life in nature from different angles.