The pyramids have undoubtedly become synonymous with Egypt. You may not know that Egypt has the Nile River, you may not know that Egypt has temples, you may not know that Egypt has the Red Sea, but no one does not know that Egypt has pyramids! Because of the heavy veil of five thousand years, because of its incredible tallness and majesty, and because there are too many amazing numerical mysteries, the mysterious coat of the pyramid has never fallen off. It is said that time can change everything, but there is an Egyptian proverb: "Human beings are afraid of time, and time is afraid of pyramids."

There are more than a hundred pyramids in Egypt, the most famous of which is located in Meng, the capital of the ancient Egyptian kingdom. The "Giza Pyramids" (Giza Pyramids) are located north of Fez and southwest of Cairo, the current capital of Egypt. The Giza Pyramids are not a single pyramid, but a collective name for a group. It is the tallest building in ancient Egypt.

There are 10 pyramids in the Giza Pyramid Group. The three largest and best-preserved pyramids were built by the three emperors of the Fourth Dynasty: the Pyramid of Khufu, the Pyramid of Khafre and the Pyramid of Menkaure. The pyramids were built between 2600 BC and 2500 BC, which we now often call the Great Pyramids. There are many "mastabas" (meaning benches in Arabic) and small pyramids around the three large pyramids.

The Pyramid of Khufu is the largest of the Giza Pyramids, and the largest of all the pyramids in Egypt. It is listed as the "first of the seven wonders of the ancient world" and has withstood the past four thousand years. The only thing that has survived many years of testing, which is why the Egyptians dare to say, "Human beings are afraid of time, and time is afraid of the pyramids."

The original height of the Pyramid of Khufu is 146.4 meters, which is equivalent to a 40-story skyscraper. Due to weathering over time, 10 meters of the top of the building peeled off, and it is now 137 meters high. The base of the tower is square, each 230.6 meters long, covering an area of ??5.3 hectares. The entire pyramid is made of 2.3 million stones of varying sizes. Weighing from 1.5 tons to 160 tons, the total weight of the tower is approximately 6.84 million tons. Some researchers who love pyramids calculated that if the stones of the pyramids were transported by train, 600,000 wagons would be needed; if these stones were cut into small pieces with an average of one cubic foot, they could circle the earth along the equator.

The four inclined planes of the Pyramid of Khufu face the east, south, west and north directions. Each plane is almost an equilateral triangle, with an inclination angle of 51 degrees and 52 minutes. Researchers have discovered that back in 2500 BC, four tunnels pointed to four special stars that were crossing the meridian at that time. They were respectively aligned with the second star "Emperor Star" in the constellation Ursa Minor and the brightest star in the constellation Canis Major. The stars "Sirius", "Polaris" and the first star in Draco constellation "Right Star".

There is also an Englishman named Ferendez Petrie who is a crazy lover of pyramids. He and his father spent 20 years surveying and mapping the Pyramid of Khufu, and were surprised to discover many magical things. Numbers: The height of the pyramid multiplied by 1 billion equals the distance from the earth to the sun (150 million kilometers); the weight of the pyramid multiplied by ten to the fifteenth power equals the weight of the earth; the circumference of the base of the pyramid divided by the height of the tower multiplied by 2 equals pi ,etc. It seems that the entire history and future of nature is hidden here.