Groundwater is rapidly declining in the Colorado River Basin, satellite data show
31
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Showing only topics with the tag "aqueducts".
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We can terraform the American West
14 votes -
The Barbegal Aqueduct included a watermill complex with water cascading through a total of sixteen wheels. It may have been "the greatest known concentration of mechanical power in the ancient world"
13 votes -
Kayaking the sickest urban river in Australia
5 votes -
Naval gladiator battles - What were they like?
4 votes