Screen shot of the first 3D PDF published in _Nature_ in 2009 \cite{2009Natur.457...63G}.     A video demonstration of how users can interact with the figure is [on YouTube, here](https://www.youtube.com/watch?v=AEuCA22Eq1s). Open [the PDF here](http://www.nature.com/nature/journal/v457/n7225/pdf/nature07609_3D_web.pdf) in Adobe Acrobat to interact.