Near Luxor stand the Colossi of Memnon, two giant statues built for Pharaoh Amenhotep III around 1350 BC. Each rises about 59 feet tall and weighs roughly 720 tons. The statues were originally carved from single blocks of quartzite quarried at Gebel el Ahmar near Cairo, more than 420 miles away from where they stand today. Earthquakes later shattered the original monoliths into large sections, and many of those pieces were reassembled in antiquity, which is why the statues now appear as massive fitted blocks. Even in their damaged state, the scale of the project is staggering. Which raises the question. How did people 3,400 years ago move such colossal blocks such vast distances?