Rainbow is formed by small water droplets in the sky. Small water droplets refract natural light like a prism, forming all kinds of monochromatic light in the sky, which is really amazing! However, due to the deterioration of environment and weather, rainbows become less and less common after rain.

2. Meteor shower

Whenever some well-known comets run near the earth, there will be meteor shower wonders on the earth, such as the Leonid meteor shower. First, the comet approaches the sun and is irradiated by high energy, evaporated, vaporized and shattered when it approaches the earth.

Influenced by the gravity of the earth, comet fragments fell to the earth. When passing through the atmosphere, they glow and heat due to high-speed friction with the air, and countless comet fragments "meteor showers" fall from the ground. But most meteor showers burn in the atmosphere.

3. Lightning

Storm clouds usually produce charges, with negative charges at the bottom and positive charges at the top. They also produce positive charges on the ground, which move around with the clouds. Positive and negative charges attract each other, but air is not a good conductor. Positive charges rush to treetops, hilltops, tall buildings and even human bodies in an attempt to meet negatively charged clouds.

Dendritic tentacles with negative charges extend downward and get closer to the ground. Finally, the positive and negative charges finally overcome the air barrier and connect. A huge current rushed from the ground to the clouds along the conductive path, producing a bright flash. The length of lightning may be only a few kilometers, but the longest can reach hundreds of kilometers.

4. "Holiday" phenomenon

There are four suns in the sky at the same time It is normal to see four suns in the sky at the same time. This is a physical phenomenon called "vacation".

This kind of landscape can only be formed under specific climatic environment or meteorological conditions. Holidays appear in the sky because the temperature is low, the water vapor in the air is sufficient, and the water vapor condenses into ice crystals in the clouds. When ice crystals are refracted or reflected by sunlight, there will be a "holiday" phenomenon. There are many kinds of "holidays", some of which are ring-shaped and called halo. Some become light spots.

5. The mysterious Shennongjia in China?

Shennongjia is located at the junction of Sichuan and Hubei between the Yangtze River and Hanshui River in China, and is known as the "Roof of Central China". It covers an area of 3,250 square kilometers, with forest land accounting for more than 85%. Average elevation1700m, highest point 3105m. There are many climate types. ?

When it comes to Shennongjia, people can't help thinking of "savage". From ancient times to the present, a large number of records and legends about savages make it difficult to distinguish between true and false.

From 1977 to 1980, the relevant departments organized two large-scale savage expeditions and collected a lot of evidence of the existence of savages, such as their hair, footprints and feces. And also found the bamboo nest where the savage lived. The results of the investigation seem to show that there is indeed a strange animal unknown to people in Shennongjia. ?