Such is the captivating nature of drone photography that online communities have quickly formed around this emerging, high-flying art form. Dronestagram is one example, whose turn it is now to showcase its finest images from the year.
Axones nerviosos - A cross section of a bundle of nerve fibers. Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells. Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.