New observations have led astronomers to suggest that Copernicus may have been wrong and the Earth does have a special place in the universe: at the center of a gigantic cosmic void.
Deadline: Jun 29 2013
Reward: $7,000 USD
The Seeker for this Challenge desires proposals for chemical methods that could rapidly degrade a dilute aqueous solution
Deadline: Jul 15 2013
Reward: $5,000 USD
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