See if you can find the 8 differences in each set of images.
Carbon nanotubes disordered by the big earthquake
The upper image shows disordered carbon nanotubes grown on the day of the big earthquake in Japan in 2011, as compared to the lower image, which was obtained at normal condition.
Yoshihiko Takano,National Institute for Materials Science, Japan
Nanowire candles
This high-magnification scanning electron microscope image shows candle-like ZnO nanowires growing through a catalyst-drifting mechanism in a chemical vapor deposition system.
Jian Shi,University of Wisconsin, USA
The answers will be in the April 2013 issue.
