A nature reserve in central Hungary has become a testing ground for self-contained, solar-powered train travel. Engineers say the narrow gauge train is the first of its kind, and could become a template for larger train transport systems.
Deadline: Jan 11 2014
Reward: $20,000 USD
Conventional washing machines cause excessive damage and wrinkling to clothes primarily during the water removal step. With the introduc
Deadline: Jan 27 2014
Reward: $15,000 USD
The Dow Chemical Company is the leading producer of polyalkylene glycols (PAGs) used in synthetic fluids and lubricants where petroleum,
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