This month's News, Views and Comments column differs from those that have appeared in previous issues. The first of the companion papers presented here offers the first in-depth historical overview of Dr. Peter Neubauer's controversial study of infant identical twins separated at birth, launched in the 1950s. The author, Dr. Lawrence Perlman, was a research assistant on the project while earning his doctoral degree in clinical psychology from New York University. His paper is followed by my own critical appraisal of issues raised by that study, some of which are still timely today. Readers are invited to forward their comments to me (nsegal@fullerton.edu) for possible consideration in future columns of Twin Research and Human Genetics.