See if you can find the 8 differences in each set of images.
Sahara world
This Sahara landscape with mysterious signs was formed by slow evaporation of a low-concentration ZnO-nanorods solution on a vertical fixed SiO2substrate. The image with real dimensions of 2.87 mm × 1.04 mm was captured by an optical microscope in bright field mode.
Stefan Thiemann, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
Radiation burst
This nanoscale antenna array radiation pattern simulation shows a detail of grating lobes from a MATLAB model of the possible radiation pattern from a driven square array of carbon nanotubes.
Tim P. Butler, Cambridge University, UK
Answers will be in the February 2013 issue.