The contingent history of science

p-ter points out that selection of model organisms can shape the path of scientific research because of the very nature of model organisms. Normative considerations in science are pretty obvious when you look at the set of disciplines; there's a whole field of biological anthropology which studies one species. There is the rather well known case that doctoral research arcs are constrained to a relatively short period, which resulted in a focus short-lived organisms in zoological studies. Imagine trying to write up grant applications focusing on the life history of the tortoise.