Egyptian pyramids: pyramids are built accurately, and huge stones are built one by one. There is no adhesive between the stones, but they are so seamless that even a thin blade can't be inserted. The difference between the four bottoms is less than 20 cm and the error is less than one thousandth. The cone angle is 52 degrees, which is the most stable angle naturally formed. The shape of the square cone forces the desert storm to rise slowly along the slope or edge of the tower to minimize the destructive power of the wind. The huge tower foundation is laid in the center of the geomagnetic field lines and moves with the movement of the earth. The amplitude it bears is extremely weak and can last for many years. How did the ancient Egyptians mine these huge stones, and what did they use to carry and pile them up? Such a construction project needs a labor force of 50 million people. Where did the massive labor force to build the pyramids come from? The pyramids really have too many mysteries.
Stonehenge: It is located in the ancient and vast Salisbury, Witshire, southern England. In the year of 1 130, a priest came across it and attracted the attention of the world. The main body of Stonehenge consists of dozens of huge stone pillars, which are arranged in several complete concentric circles. Stonehenge is surrounded by circular trenches and mounds with a diameter of about 90 meters, and there are 56 circular pits inside. The most incredible thing about Stonehenge is the boulder in the center of Stonehenge. The tallest of these boulders is 8 meters, with an average weight of nearly 30 tons. However, people were surprised to find that many huge stones weighing 7 tons were placed horizontally on two vertical stone pillars. Every summer solstice, the sun rises in a straight line with a stone called "heel". For centuries, no one knows the real purpose of Stonehenge, and no one knows who built Stonehenge. Ancient legends and people's guesses add a mysterious atmosphere to Stonehenge.
Stone statue of Easter Island: Easter Island is a small island in Chile with an area of 1 17 square kilometers. There are more than 600 huge stone statues standing on the island. Generally, it is 7 ~ 10 meter high and weighs 30 ~ 90 tons. Some stone statues and hats weigh 10 tons. The stone statue is carved from a whole piece of dark red igneous rock. All the stone statues have no legs, they are busts, and their shapes are similar. All the stone statues face the sea, and their expressions are indifferent and dignified. From a distance, it looks like a group of warriors preparing for war, which is spectacular. But when were these stone statues carved? How did such a tall stone statue move to the seaside? What happened to some unfinished stone statues and suddenly stopped? Is still an unsolved mystery.
Crop circles: The first crop circle occurred in 1647 in England, and a regular circular pattern appeared in a wheat field full of wheat overnight. Since then, crop circles have been frequently found in the United States, Australia, Europe, South America, Asia and other places, most of which are in Britain. Up to now, there are about 250 crop circles around the world every year, and the patterns are also different. Regrettably, for more than 350 years, the scientific community has been controversial about how the strange circle was formed.
Magic tornado: Tornadoes have a strange shape. Its upper part is black or thick gray cumulonimbus clouds, and its lower part is a drooping funnel-shaped cloud column shaped like an elephant's nose. It's small, fast, fierce and short. The wind speed of a tornado is generally 50 to 100 meters per second, and sometimes it can reach 300 meters per second, which exceeds the speed of sound. It's like a giant vacuum cleaner. After crossing the ground, everything on the ground will be swept away by it. After passing through reservoirs and rivers, the water column often rolls up into the sky, and sometimes even exposes the bottom of reservoirs and rivers. At the same time, tornadoes are short-lived, often only a few minutes or dozens of minutes, at most a few hours. Tornadoes also have some unpredictable "weird behaviors". It swept the town, destroyed houses and scraped the cupboard from one place to another without breaking a bowl in the cupboard; Stunned people are often carried high into the air by it, and then safely sent back to the ground by it, and so on. People have studied the formation and consequences of tornadoes for many years, but there are still many unsolved mysteries.