Scientists may have solved the mystery of how the ancient Egyptians hauled millions of 2-ton blocks of stone through the desert to build the pyramids

Ancient Egyptians built the spectacular Giza pyramids in what is now a desert landscape. How they hauled the tons-heavy building blocks to the pyramids has long been a mystery.  

By tracking ancient pollen, scientists discovered a branch of the Nile that disappeared thousands of years ago. Researchers have uncovered a now-dried-up branch of the Nile

that came right up to the great pyramid complex of Giza about 4,500 years ago.  The findings, published in the Proceedings of the National Academy of Sciences on Monday,

explain how ancient Egyptians were able to haul millions of the tons-heavy building blocks to the site of the iconic pyramids over four miles of what is now a desert

landscape.  "It was impossible to build the pyramids here without this branch of the Nile," study author and geographer Hader Sheesh said, per The New York Times.A

4,500-year-old architectural marvel that still baffles scientists Awesome  in size, with perfect geometry, and adorned with intricate decorations, the pyramids at Giza, on the

outskirts of modern Cairo, served to demonstrate the power of the pharaohs in Egypt's golden age. The site comprises three pyramids and the Great Sphinx of Giza, built as

ornate, awe-inspiring mausoleums for pharaohs Khufu, Khafre, and Menkaure between about 2560 B.C. and 2540 BC. Khufu's pyramid, known as the Great Pyramid, was the first to

be built and the biggest of the three. It comprises an estimated 2.3 million blocks of limestone and granite. Each block weighs between 2.5 and 15 tons, per National

Geographic.