I took this photomicrograph a couple of years ago, but haven’t had a proper forum for showing it off until now.
In short, it shows a cluster of fluorescently stained nerve cells, grown in culture.
For the aficionados:
Primary embryonic mouse cortical neurons. Grown six days in culture, fixed and stained by immunocytochemistry. RED: Map2A (cytoskeleton), GREEN: beta-tubulin (cytoskeleton), BLUE: Hoechst DNA dye (nuclei).