NASA's Kepler spacecraft has discovered nearly 3,000 possible exoplanets by tracking slight fluctuations in starlight to reveal their orbits. This is one of several methods employed in the hunt for the next habitable world. John Matson explains.
Deadline: Jan 27 2014
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The Dow Chemical Company is the leading producer of polyalkylene glycols (PAGs) used in synthetic fluids and lubricants where petroleum,
Deadline: Dec 11 2013
Reward: $52,000 USD
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