A team of researchers with members from China and Singapore has found that it is possible to use persistently luminescent nanocrystals to create 3-D X-rays. In their paper published in the journal Nature, the group describes a means for creating nanocrystals that can hold onto excited charge carriers, and how they used those crystals to fashion a bendable sheet that could be used to create 3-D images using X-rays. Albano Carneiro Neto and Oscar Malta, with the University of Aveiro and the Federal University of Pernambuco, respectively, have published a News & Views piece in the same journal issue outlining the history of 3-D X-ray research and the work done by the team with this new effort.