Mary Douglas Leakey is best known for her discoveries in which field?

Mary Douglas Leakey is best known for her significant contributions to the field of paleontology, particularly in the study of human evolutionary history. As a renowned fossil hunter and anthropologist, she made groundbreaking discoveries in East Africa, including important hominid fossils such as those of early human relatives. Her work has provided crucial insights into the development of early hominins and their environments. Leakey's findings have greatly enhanced our understanding of human origins and the evolutionary process.

While geology may relate to paleontology by providing context about the earth's history and formations where fossils are found, Leakey's primary focus was not within this discipline. Social anthropology and cultural anthropology also diverge from her focus on physical evidence of ancient life forms. Thus, her legacy is firmly established in the field of paleontology through her extensive fossil discoveries and research on hominin evolution.