Portal’s heat exchanger thruster, known as Flare, fires up during a test in a vacuum chamber. (Portal Space Systems Photo) Bothell, Wash.-based Portal Space Systems says it has successfully tested its ...
The new SHE yacht, short for Sanlorenzo Heritage, features hybrid diesel-electric power, floor-to-ceiling windows, and a ...
Most new renewable energy projects take the form of massive wind or solar farms. Ann Arbor, Michigan, is trying something different: a new city-owned utility is building a local power network within ...
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