See if you can find the 8 differences in each set of images.
The night sky
Scanning electron microscope image of tin droplets on a textured ZnO:Al substrate. This is used for growing silicon nanowires for photovoltaic applications.
Soumyadeep Misra, LPICM-CNRS, École Polytechnique, France
June 2016 answer key
NiSb2
NiSb2 obtained by solid-state synthesis and used as a negative electrode for Na-ion batteries.
Claire Villevieille, Paul Scherrer Institute, Switzerland
Answers will be published in the October 2016 issue.