Radiolarians are a highly diverse group of marine protozoa widely recognized for their intricately ornate mineral skeletons. Part of the plankton community, radiolarians have a fossil record that extends back to the early Paleozoic era. Because they have undergone continuous evolutionary change, they are often used to analyze the layers of the marine sedimentary record. What German biologist produced exquisite drawings of radiolarians that helped to popularize them among Victorian microscopists? Discuss
Source: The Free Dictionary