forest in the eye ...saw elsewhere that this might be a photomanipulation, and not a true high def photo. so that may not be what the blood vessels really look like, but it's still a really cool image!
G-actin is a protein involved in muscle contraction. It forms loose bundles that self-organize into regular patterns. The image was captured using total internal reflectance fluorescence (TIRF) microscopy. Dennis Breitsprecher