source: http://www.fastcodesign.com/1670138/10-of-the-years-most-amazing-science-photos#1
Diatom frustule
Diatom frustule
This
false-colored scanning electron micrograph shows a diatom frustule, a
unicellular organism that is part of a major group of algae. Diatoms are
one of the most common types of phytoplankton, and their communities
are often used to measure environmental conditions such as water
quality. This particular example is approximately 80 microns in
diameter.-Anne Weston, London Research Institute, Cancer Research, UK--
