96 pyramids have been discovered in Egypt, the largest of which is located in Giza, a suburb of Cairo. The pyramids are tombs built by the kings of ancient Egypt for themselves. The Great Pyramid is the tomb of Khufu, the second king of the fourth dynasty. It was built around 2690 BC and its original height was 146.5 meters. Due to years of weathering, its top has peeled off10m, and now its height is136.5m.. Each side of the base is more than 230 meters long, the slope of the triangular surface is 5 1 degree, and the bottom area of the tower is 52,900 square meters. The tower consists of 2.3 million stones, each weighing an average of 2.5 tons. It is said that it took 65438+ ten thousand people 20 years to build it. The passage inside the pyramid is open to the outside world. The paragraphs are exquisitely designed and calculated, which is amazing. The second pyramid is the tomb of King Havla, son of Khufu. It was built in 2650 BC, 3 meters lower than the former, but the architectural form is more perfect and spectacular. There are temples and other ancillary buildings in front of the tower, and the face of the famous Sphinx is called Hafra. The body is a lion, 22 meters high and 57 meters long. One ear of the statue is 2 meters high. Except for the lion's claws, the whole statue is carved from natural rocks. Because the stone is loose, it has gone through more than 4000 years, and the whole statue has been severely weathered. In addition, the face was severely damaged. Some people say that Ma Mruck used it as a target to practice shooting, while others said that it was a trace left by the shelling when Napoleon invaded Egypt in the18th century. The third pyramid belongs to King Koala, the grandson of Khufu, and was built around 2600 BC. At that time, it was the decline of the fourth dynasty, and pyramid architecture began to decline. The height of the Menkoala pyramid suddenly dropped to 66 meters, and the internal structure was chaotic. There is a famous Sun Boat Museum in the south of pyramid of khufu. Khufu's son used a solar boat to transport Khufu's mummy to the pyramid for burial, then took the boat apart and buried it underground. The museum was built on the site unearthed by the sun boat. The hull is made of pure wood structure and tied with ropes. [Problem solving process] It is estimated that when the pyramids were built, the residents of Egypt at that time must be 50 million, otherwise it would be difficult to maintain the food and labor needed for the project. When experts open the pages of history, they find this problem even more difficult to understand. In 3000, the world population was only about 20 million. In addition, a large number of laborers must work in farmland to maintain lasting food. However, the farmland provided by the narrow Nile Valley seems to be insufficient to maintain the demand of the construction team. You know, the team has100000 people. Can the agricultural harvest of the Nile alone maintain the demand of the project? Furthermore, what is used to carry the huge stones needed by the temple? The ancient Egyptians used the log to transport the boulder to the construction site, which was the most primitive method, but the log needed the trunk of a big tree to make it. We can know that there are few trees in the Nile Valley. Palm trees are widely distributed and grow on both sides of the Nile, but it is impossible for ancient Egyptians to cut down palm trees in large quantities, and palm trees with soft texture cannot be used as rolling logs. Because the fruit of palm trees is an indispensable food source for Egyptians, palm tree leaves are the only shade material in the hot desert. It is estimated that the Great Pyramid consists of 2.6 million stones, each weighing about 65,438+00 tons. There is no cement between the stones of the tower. After 4500 years of wind and rain, the gap is still quite tight, and it is difficult to insert a sharp knife. It is incredible that such exquisite craftsmanship was made by craftsmen or slaves in ancient Egypt 4,500 years ago. It's hard to believe that the pyramid is just the tomb of Pharaoh, and it will take 2.6 million days (that is, 700 years) to complete this building, no matter how these 2.6 million boulders were excavated. It will take 70 years to speed up the project progress. I believe Lao Wang can work out such a simple figure. Why did they build this grave that they couldn't enjoy? How mysterious is the pyramid? Has it ever occurred to you that the pyramids have a connection with astronomy and mathematics that modern people can't understand? The construction of pyramids can determine the system of weights and measures. The length unit of the Great Pyramid is determined according to half the length of the long axis of the earth's rotation, that is, the bottom of the Great Pyramid is10% of the length of the long axis of the earth's rotation; The weight unit of the Great Pyramid consists of the above-mentioned length unit and the density of the earth. The unit of heat of the Great Pyramid is the average temperature of the whole earth's surface. In addition, the size of the tombs in the Great Pyramid showing Pharaoh's coffin is 2:5:8 and 3:4:5, which is exactly the formula of the coordinate triangle. The inventor of this formula is the ancient Greek philosopher Vadagoras. When Vadagoras was born, the pyramids had been built for 2000 years. The site of the Great Pyramid is also interesting, because the meridian passes right through the center of the Great Pyramid, that is, it is located in the middle of the meridian, which seems to reveal why the builders of the Great Pyramid chose this unique rock zone in the desert as the tower site. This rock has a V-shaped natural crack, which is just used to build a huge mausoleum. Moreover, it is impossible for people who know the local structure, land and sea distribution of the pyramids to choose this place as the tower site, but did the ancient Egyptian pharaohs have this ability? Recently, there was an amazing discovery in Egypt. Archaeologists say there are aliens or creatures in the pyramids. They found a frozen object in the secret room of the tower, and the detection instrument showed that there was a heartbeat frequency and blood pressure display in the object, which is believed to have existed for 5000 years. Experts believe that there is a creature under the ice. Scientists also learned from a scroll of hieroglyphs found in the tower that something called "flying carriage" hit a survivor near Cairo about 5,000 years ago. According to the literature, the survivor is a designer, and archaeologists believe that this alien is the builder of the pyramid. Pyramids are used as a sign to inform similar people in outer space to go to rescue, but what puzzles scientists most is how astronauts hide themselves in ice. The damage of the Sphinx connected with the pyramids of Giza has been very serious. Because it is made of limestone and was buried in the soil before, salt damage caused serious damage. Now, strong winds in the desert have become another problem. Weathering gradually made these monuments disappear.