See if you can find the 8 differences in each set of images.
Graphene fractals on SiC
Fractals of graphene on silicon carbide observed using scanning near-field optical microscopy.
Achim Woessner, The Institute of Photonic Sciences, Spain.
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20181109131002758-0214:S0883769418000878:S0883769418000878_figu1g.jpeg?pub-status=live)
Bismuth crystals
Rainbow-like colors originating from thin-film interference on bismuth crystals.
Ralph Lange, ETH Zürich, Switzerland.
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20181109131002758-0214:S0883769418000878:S0883769418000878_figu2g.jpeg?pub-status=live)
February 2018 answer key
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20181109131002758-0214:S0883769418000878:S0883769418000878_figu3g.jpeg?pub-status=live)
Answers will be published in the June 2018 issue.