Scientists may have just solved one of the greatest mysteries of the ancient world after making a landmark new discovery in Egypt. The team have uncovered a long-lost branch of the River Nile, which has been hidden under desert and farmland for millennia. Archaeologists had long suspected that the ancient Egyptians relied on a waterway to transport the massive stone blocks and other materials needed to build the towering pyramids. Ancient Egyptians could "use the river's energy to carry these heavy blocks, rather than human labour," Dr Onstine explained, adding simply: "It's just a lot less effort". The River Nile was Egypt’s main artery and beating heart 4,000 years ago, and it remains so to this day.