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.

figure 1

February 2018 answer key

Bismuth crystals

Rainbow-like colors originating from thin-film interference on bismuth crystals.

Ralph Lange, ETH Zürich, Switzerland.

figure 2
figure 3

Answers will be published in the June 2018 issue.