the images taken at the medical school of Boston University of the circulating blood inside a hamster's cheek pouch. Vishniac invented new methods for light-interruption photography and color photomicroscopy. His method of colorization, (developed in the 1960s and early 1970s) uses polarized light to penetrate certain formations of cell structure and may greatly improve the detail of an image. In the field of biology, Vishniac specialized in marine microbiology, the physiology of ciliates, circulatory systems in unicellular plants and endocrinology (from his work in Berlin) and metamorphosis. Despite his aptitude and accomplishments in the field, most of his work in biology was secondary to his photography: Vishniac studied the anatomy of an organism primarily to better photograph it. Besides experimenting with the metamorphosis of axolotl, he also researched the morphology of chromosomes in 1920: both in Berlin. As a biologist and philosopher in 1950, he hypothesized polyphyletic origin, a theory that life arose from multiple, independent biochemical reactions, spawning multicellular life. As a philosopher, he "developed principles of rationalistic philosophy" in the '50s. Other photography Vishniac is notable for his photographs of insects mating, sea bass feasting and other living creatures in full animation. Skillfully and patiently, he would stalk insects or other such creatures for hours in the suburbs around New York City. Before beginning the hunt, he would lie for over an hour in the grass, rubbing himself with proximate flora to make himself smell less artificial. He would then gracefully swoop close to his prey and patiently frame the scene with an SLR equipped with an extension tube. He had even trained himself to hold his breath for up to two minutes, so that he could take his time and not disturb slowly exposing images. Vishniac's subjects varied throughout his life. At times, he would focus on documenting everyday life, as in Berlin, and later portraiture, doing famous portraits of Albert Einstein and Marc Chagall. He was also a pioneer in time-lapse photography, on which he worked from 1915 to 1918, and again later in life. Religion and philosophy Roman Vishniac always had strong ties with his ancestry, especially the Jewish aspect of it, "From earliest childhood, my main interest was my ancestors". He was a Zionist and a strong sympathizer with Jews who had suffered because of anti-Semitism, "Oh yes, I could be a professor of anti-Semitism", also stating then that he had one hundred and