The Year's Most Amazing Scientific Images
This striking image actually shows part of an ox's eye, and the capillaries in it. Capillaries are small blood vessels, which act as the connective network between arteries and veins. The capillaries have been made visible by injection of an insoluble dye into the artery that supplied them.
The Grand Prismatic hot spring is a deep thermal spring, richly colored by growths of exotic heat-loving micro-organisms. Some believe they offer a glimpse of what the first life on earth would have looked like.
