Science, civilization and society

Some examples of Roman aquaeducts (water supply systems).
	In Carthage, Tunisia. Photo: © Maciej Sczepanczyk, GNU Free Documentation License (Wikipedia)
	In Valens, Turkey. Photo: © David Bjorgen, Creative Commons ShareAlike License (Wikipedia)
	The famous "Pont du Gard" in France, still used as a bridge across the river. Photo: GNU Free Documentation License (Wikipedia)
The aquaeduct in Segovia, Spain. Photo: © Matthias Tomczak; GNU Free Documentation license