What do you feel was Rome's greatest scientific or technological advance and why?

Rome's greatest scientific and technological advance was its development of aqueducts, which revolutionized water supply and management in urban areas. These impressive engineering feats allowed for the transportation of fresh water over long distances, significantly improving public health and sanitation. The aqueducts facilitated the growth of cities and supported complex societies, demonstrating the Romans' advanced understanding of hydraulics and engineering principles. This infrastructure laid the groundwork for modern water systems, showcasing the enduring impact of Roman innovation.