Ever wonder how new 3-D technology differs from the old red-and-blue glasses popular in the 1950s? Scientific American editor Larry Greenemeier explains--and makes a special appearance in 3-D.
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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