Oct 20, 2012 | 10
According to the United Nations, we are losing about 200 species per day--a thousand times the normal background rate of extinction. How does this stack up to previous mass extinctions? Scientific American editor Fred Guterl explains.
Deadline: Jul 25 2013
This challenge provides an opportunity for Solvers to build a web-based or mobile “app” to explore data relationships in scholarly conte
Deadline: Jul 30 2013
Reward: $100,000 USD
The Seeker desires a method for producing pseudoephedrine products in such a way that it will be extremely difficult for clandestine che
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