For centuries, people have wondered how ancient Egyptians built the Great Pyramid of Giza using massive stone blocks without modern technology. A recent archaeological discovery may finally offer a clue.

Researchers believe that the Egyptians used a Nile River tributary to transport the stones. Through deep excavations near Giza, they found evidence of an ancient waterway, known as the Khufu Branch, which dried up around 600 BC but was active 4,500 years ago during the pyramid’s construction. This waterway likely made it easier to move the enormous limestone and granite blocks needed for the pyramid.

This discovery supports a long-held theory, backed by an ancient papyrus, that describes transporting pyramid materials by water. According to environmental geographer Hader Sheisha, this tributary acted like a “natural conveyor belt” for the stones, making the seemingly impossible task much more manageable.

This exciting find gives us a glimpse into the ingenuity of the Egyptians and may finally explain how they achieved one of history’s greatest architectural feats.

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