In ancient China during the Song Dynasty, a great scientist named Shen Kuo wrote a scientific work titled "Dream Pool Essays." In this book, he recorded a miraculous phenomenon: a duck egg that could emit light. In 1707, a European named Paulinus encountered a similar phenomenon when he discovered a glowing chicken egg. In fact, there are many things in nature that can glow, such as certain bacteria on decaying wood that emit cold light at night; a plant in Africa known as the "Tree of the Devil" that glows day and night; and in China, there is also the "Luminous Tree."

In the vast ocean, fish and plankton also emit light due to the presence of luminescent substances in their bodies. Modern scientific research has shown that the human body also continuously emits a faint glow, although it is difficult for the naked eye to perceive. However, some individuals can emit visible light.

As early as 1669, the famous Danish doctor Barning discovered that an Italian woman’s body emitted light. In the 1930s, another glowing woman appeared in Italy, seemingly surrounded by a halo of light as she walked at night.

Some scientists believe that the human body's glow may be due to particularly strong mitotic rays in the blood, which excite certain substances in the body to emit fluorescence. Other scientists suggest that when believers are highly excited and focused on their religious faith, their skin may also emit light.

Research by Chinese scientists indicates that the human body emits light at every moment, and this light is unrelated to temperature, only visible as a faint glow like that of a flashlight from 200 kilometers away. However, scientists have yet to find a perfect answer as to why only a few individuals can emit visible light.