Stunning image of smallest possible five-ringed structure May 27, 2012 Stunning image of smallest possible 5 rings Enlarge Olympicene radical AFM Laplace filtered. The black bar corresponds to 0.5 nm. Credit: IBM Research - Zurich, University of Warwick, Royal Society of Chemistry Scientists have created and imaged the smallest possible five-ringed structure – about 100,000 times thinner than a human hair – and you'll probably recognise its shape. http://phys.org/news/2012-05-stunning-image-smallest-five-ringed.html