STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Beaver penis. Coloured scanning electron micrograph (SEM) showing the prepuce (foreskin) of the penis from a beaver (Castor sp.). The pointed organ seen here is used to stimulate ovulation in the female. Magnification: x200, when printed 10cm wide.
Model release not required. Property release not required.