These ribbon-like structures are striated muscle fibers magnified at 750x. You can see the fiber bundles as thin vertical lines throughout the image. Under polarized light, these ribbons take on the look of an alien landscape seen from above. Here is a glimpse of a world we seldom see. This one took some doing, as I had to minimise camera vibrations during a long exposure. Image obtained with a Leitz Ortholux microscope using darkfield illumination and polarizing filters. Prepared, balsam mounted slide.