<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54caddb4c54f5_-_impossible-visualizations-03-0212-de.jpg>
<http://www.popularmechanics.com/science/health/g781/seeing-the-impossibly-small-10-wild-scientific-visualizations/>