Aboriginal people built water tunnels Judy Skatssoon ABC Science Online Wednesday, 15 March 2006 The rainbow serpent, a key Aboriginal Dreamtime creation symbol, is closely connected with Indigenous knowledge of groundwater systems (Image: Reuters) Indigenous Australians dug underground water reservoirs that helped them live on one of the world's driest continents for tens of thousands of years, new research shows. The study, which is the first of its kind, indicates Aboriginal people had extensive knowledge of the groundwater system, says hydrogeologist Brad Moggridge, knowledge that is still held today. Some 70% of the continent is covered by desert or semi-arid...