Cosmic rays are subatomic particles from deep space that are constantly bombarding the Earth's atmosphere. Scientific American editor Phil Yam explains how they might play a role in seeding bolts of lightning.
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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