“Understanding Greek and Roman Technology: From Catapult to the Pantheon” S:1 E:12 From Source to City-Water Supply Systems

S:1 E:12 From Source to City-Water Supply Systems Delve into the history of water supply technologies. The Greeks solved the problem of transporting water across deep valleys by building inverted siphons. By contrast, the Romans preferred to use arcaded aqueduct bridges whenever possible. Why was this apparently extravagant technique often more practical?