They are miracles of engineering dating back thousands of years -- remains of ancient structures around the world that seem too heavy to move. From the towering 80-ton statues on Easter Island...to the Roman God of Thunder's Temple 800-ton trilithon stones...to the colossal 30-ton stone heads moved eighty miles over brutal mountainous terrain. Scientists and engineers search for clues and set out to solve the mysteries of how primitive Mega Movers pushed the limits of ingenuity and pulled off the impossible.