On some plants, the included angle between two adjacent petioles is137 28', which is exactly the included angle between two radii that divide the circumference into 1:0.6 18.

According to research, this angle has the best effect on ventilation and lighting of the factory building.

The leaves of plants, with different shapes and vitality, bring a beautiful green world to nature.

Although the shape of leaves varies from species to species, its arrangement order on the stem (called leaf order) is very regular.

The growth of petals and branches on the trunk of some plants also conforms to this law.

You look down from the top of the plant stem, and after careful observation, you find that the included angle between the upper and lower adjacent leaves is about 137.5.

If only one leaf is drawn on each layer, the angle difference between two adjacent leaves on the first layer and the second layer is about 137.5, and the next two to three layers, three to four layers, four to five layers ... are all at this angle.

Botanists have calculated that this angle is the best angle for lighting and ventilation of leaves.

How delicate the arrangement of leaves is! What is the "password" hidden in the angle of 137.5 between leaves? We know that a week is 360,360-137.5 = 222.5,137.5: 222.5 ≈ 0.618.

Look, this is the "password"! The ingenious and magical arrangement of leaves actually hides the ratio of 0.6 18.

Medicine is inextricably linked with 0.6 18, which can explain why people feel most comfortable in the environment of 22-24℃.

Because the product of the body temperature of 37℃ and 0.6 18 is 22.8℃, and the metabolism, circadian rhythm and physiological function of the human body are in the best state at this temperature.

Scientists also found that when the external environment temperature is 0.6 18 times of human body temperature, people will feel most comfortable. Modern medical research also shows that 0.6 18 is closely related to the way of keeping in good health, and the dynamic-static relationship is 0.6 18, which is the best way of keeping in good health.

Medical analysis also found that people who eat 60% to 70% full will hardly have stomach problems.

Human body temperature is 37 degrees, and room temperature is 23 degrees, which is the most comfortable temperature for human beings, while 23÷37≈0.622 is very close to 0.6 18.

The ideal weight calculation is very close to the height × (1-0.6 18).

This number can be seen everywhere in nature and people's lives: the navel is the golden section of the whole human body, and the knee is the golden section from the navel to the heel.

The aspect ratio of most doors and windows is also 0.618. On some plants, the included angle between two adjacent petioles is137 28', which is exactly the included angle between two radii that divide the circumference into 1: 0.6 18.

According to research, this angle has the best effect on ventilation and lighting of the factory building.

Architects have a special preference for 0.6 18 in mathematics … whether it is the pyramids in ancient Egypt, Notre Dame de Paris or the Eiffel Tower in France in recent centuries, there are data related to 0.6 18…

It is also found that the themes of some famous paintings, sculptures and photos are mostly at 0.6 18….

The artist thinks that placing the bridge of a stringed instrument at the position of 0.6 18 can make the sound softer and sweeter.

The number 0.6 18 ... is more concerned by mathematicians. Its appearance not only solves many mathematical problems (such as dividing the circumference into ten parts and dividing the circumference into five parts; Find the sine and cosine values of 18 degrees and 36 degrees. ), it also makes the optimization method possible.