Why does ball lightning enter the unsolved mystery of the earth?

Thunder and lightning are the most common weather phenomena, but spherical lightning is one of the unsolved mysteries of the earth. The ball flash, also known as rolling thunder, has been studied by scientists for 160 years, but the principle behind it is not clear. When a thunderstorm occurs, some bright balls with a diameter of 20 to 50 cm may appear out of thin air, which can last for several seconds to one or two minutes. The most amazing thing is that the ball flash can move slowly in the air, sometimes falling to the ground and jumping into the air to disappear. In the past 160 years, scientists have not yet figured out the principle of its production.

Scientists thought it would only swim along metal objects, but later it was found that the appearance of the ball flash did not choose the occasion at all, and it could fall from the sky at any time and anywhere. For the real power of the ball flash, it is estimated that it is equivalent to several grenades, which can blow up doors and windows and have caused casualties to people and animals. In fact, the ball flash usually falls directly from the sky, which is basically impossible to prevent. After landing, it moves horizontally and quickly, often bending and rotating, with a moving speed of about 2 meters per second, passing through doors and windows or moving silently along wires.

When it disappears, it will explode, which can make buildings collapse and even hurt the lives of people and livestock. After the explosion, it will produce pungent smell, which is easy to breed fires. Moreover, ball lightning itself is immune to almost all injuries. It is said that an expert hit the ball flash with a rifle, but the bullet passed through the ball flash completely unaffected.

According to scientists' speculation, spherical flash is a highly charged gas vortex, which is composed of oxygen, nitrogen, hydrogen and a small amount of hydrogen oxide. When there is a common dendritic lightning in the sky, the ball flash will suddenly appear like an elf. Because it is extremely rare, scientists' explanation for it is not perfect.