"Brains are gorgeous at the right magnification", says Mark Miller on his "neuro" set of photos in flickr. Self-described as an intracellular recording artist, Miller shows images of a mouse's neuronal network. Covering different areas of the brain such as the cingulated cortex or motor cortex, the images are quite impressive, particularly since the neurons connecting in the brain resemble the large-scale structure of the universe.
Confocal micrograph showing the expression of different fluorescent proteins in the stem of a thale cress seedling (Arabidopsis thaliana). Arabidopsis was the first plant to have its entire genome sequenced and is an important model for studying plant biology. The middle of the image shows a region of high cell proliferation, which drives the growth and branching of the seedling.