From a backyard shed in Subiaco to a global licensing deal, DUG Technology has quietly answered one of the defining infrastructure questions of the AI age: how do you cool the machines reshaping civilisation without consuming the water that sustains it? By submerging servers in oil rather than drowning them in air and water, the Perth company has achieved what decades of conventional engineering could not — a 50 per cent reduction in power use and a 25 per cent cut in water consumption. The story is as much about the stubbornness of good ideas as it is about technology, and it raises an older