Eye color for a plausible argument stating that some eyes can or do change, based on chemical reactions and hormonal changes within the body. Studies on Caucasian twins, both fraternal and identical, have shown that eye color over time can be subject to change, and major demelanization of the iris may also be genetically determined. Most eye-color changes have been observed or reported in the Caucasian population with hazel and amber eyes. Carleton Coon created a chart by the original Martin scale. The numbering is reversed on the scale below in the (later) Martin–Schultz scale, which is (still) used in physical anthropology.
Canadian Association for Physical Anthropology of the annual meetings and hosting institutions is provided below and more details are available on the CAPA-ACAP website. Canadian Association for Physical Anthropology The Canadian Association for Physical Anthropology / L'Association Canadienne D'Anthropologie Physique (CAPA/ACAP) is a learned society of international scholars and students of Physical Anthropology in Canada. The Associations's mission is to promote and increase awareness and understanding of physical (biological) anthropology among its membership and to support institutions, agencies, and the public at large. The Association is guided by a constitution and code of ethics, holds annual meetings, distributes biannual newsletters to its membership, and offers