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Nature 447, 39 (3 May 2007) | doi:10.1038/447039a; Published online 2 May 2007

Open Innovation Challenges

  • Optimizing Sub-cellular Localization Tags

    • Deadline: Jan 31 2010
    • Reward: $20,000 USD

    The Seeker is looking for methods to optimize sub-cellular localization tags for protein expression....

  • Single-cell Analysis Platform

    • Deadline: Dec 02 2009
    • Reward: $5,000 USD

    This Challenge is looking for novel approaches to analyzing changes at a single-cell level. This is...

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Mark Buchanan1

  1. Mark Buchanan is a science writer based in the United Kingdom.

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Optimality is a key organizing principle of science, but the patterns of connections within real-world networks do not always respect it.

An 'optimal' solution to a problem is, in some sense, the 'best' solution. It's the shortest route to work, or the way of packing oranges that takes up the least volume.