Ancient aquatic system older than the pyramids revealed by Australia bushfires

Extensive water channels built by indigenous Australians thousands of years ago to trap and harvest eels for food have been revealed after wildfires burned away thick vegetation in the state of Victoria.

The Budj Bim Cultural Landscape, consisting of channels, weirs and dams built from volcanic rocks, is one of the world's most extensive and oldest aquaculture systems, according to UNESCO.

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