See if you can find the 8 differences in each set of images.
Regenerative nano-gel
Scanning electron micrograph of a network formed by peptide amphiphile nanofibers and hyaluronic acid.
Jacob Lewis, Northwestern University, USA.

Metal–organic framework fireworks
Scanning electron microscope image of metal–organic framework colloidal particles with six branches prepared by post-synthesis etching. The porous particles show improved catalytic behaviors and look like sponges in the sea or fireworks on a starry night. Each particle is pseudo-colored to highlight the complicated surface morphologies.
Zihao Ou, University of Illinois at Urbana-Champaign, USA.

August 2019 answer key

Answers will be published in the December 2019 issue.