The Great Pyramid of Giza

Great pyramids of Giza are one of the most famous mysterious places in the world, and it is the last of the ancient seven wonder of the world. There are so many scientific theories are based on the construction of these Pyramids, but nobody can prove the exact methods. There are 2,300,000 blocks of stones in that pyramids which each averaging 2 1/2 tons in weight. So what is the technology that uses to build 6.5 million ton weight structure in 20 years? Another most amazing thing is this pyramid is located in the exact center of land area of the world. How people who lived 4500 years ago have the engineering to find out to make a pyramid in that location. There are so many secrets, and myths are hidden inside these pyramids. Some scientist has a idea that alien technology has use to construct this Giant Pyramids and it has much relationship with astrology.