Around the world, engineers are searching for energy-efficient ways to cool down racks of computers in warehouses that get as hot as an oven while powering the internet, LiveScience reports. A new study suggests warm water might just be the wave of the future for cooling these energy-hogging data centers--and recouping some of their waste heat as useful energy. Early next month, IBM and a Swiss university plan to test out this concept with an innovative water-cooled supercomputer called Aquasar that will cut energy costs and contribute to campus heating needs. At 140 to 160 degrees Fahrenheit (60 to 70...

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