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.
What Color is Your Parachute? books in print. In the latest edition of the book, the author writes about how to adapt one's job search to the Web 2.0 age. The book recommends networking to find "the person with the authority to hire you", rather than sending out resumes in bulk, shotgun fashion. It also recommends carefully figuring out what one is best at and what one enjoys most, which (the author says) tend to coincide. Richard Nelson Bolles wrote numerous spinoffs of "What Color is Your Parachute", targeted at specific audiences and career issues; he also collaborated with Mark Emery Bolles to write versions