MANFRED KAGE / SCIENCE PHOTO LIBRARY MANFRED KAGE / SCIENCE PHOTO LIBRARY
Pigeon feathers, coloured scanning electron micrograph (SEM). Two barbs, which project from either side of the central rachis, are running from top to bottom. Along the lengths of the barbs are smaller filaments, known as barbules. The closely packed barbules insulate the bird. Magnification: x132 when printed at 10 centimetres wide.
Model release not required. Property release not required.