See if you can find the 8 differences in each set of images.
Frozen capsule
Scanning electron microscope image of the freeze-fractured cross section of a polynuclear microcapsule embedded in a polymer matrix.
Mostafa Yourdkhani, University of Illinois at Urbana-Champaign, USA.
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20171220060419420-0117:S0883769417002949:S0883769417002949_figu1g.jpeg?pub-status=live)
Wild delta
This “painting” was obtained by optical microscopy with an optical filter to modulate light and emphasize relief. The corrosion is gaining on the silver layer in a salt spray test.
Olivier Raccurt, The Atomic Energy and Alternative Energies Commission, France.
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20171220060419420-0117:S0883769417002949:S0883769417002949_figu2g.jpeg?pub-status=live)
October 2017 answer key
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20171220060419420-0117:S0883769417002949:S0883769417002949_figu3g.jpeg?pub-status=live)
Answers will be published in the February 2018 issue.