The micro-structure of a scale from a butterfly wing. The holes are around 1 micrometre across, about the size of a bacterium. Visualised using scanning electron microscopy by Dr Bronwen Cribb, University of Queensland.
Coloured scanning electron micrograph (SEM) of a passion flower (Passiflora caerulea) pollen grain. Pollen grains are the male gametes (sex cells) of a plant. Magnification: when printed 10 centimetres wide.
Scanning electron micrograph of the chicken egg, showing the eggshell’s crystal microstructure in cross-section. Credit: Mary Caswell Stoddard/Jeremy Skepper, Department of Zoology, University of Cambridge Not silly string, egg shell