<http://schema.org/url>
<http://www.businessweek.com/articles/2012-12-05/a-tiny-transforming-robot-inspired-by-protein-and-junkyard-magnets>
<http://www.bloomberg.com/bw/articles/2012-12-05/a-tiny-transforming-robot-inspired-by-protein-and-junkyard-magnets>