Dopamine crystal method

A beautiful image of dopamine crystals viewed with polarized light.

From the description: "A polarized light micrograph of dopamine crystals. Dopamine is a naturally occurring precursor of norepinephrine that affects various brain processes, many of which control movements, emotional responses and the experiences of pain and pleasure. Dopamine receptors are especially clustered in the midbrain. The drug L-DOPA, used to help sufferers of Parkinson's disease, is converted in the brain to...