In old family photos, the children look like one or the other of the couples. And then the children start to look like both of their parents. And then the parents start to look like one another. <source> A decades-old question of whether couples in long-term marriage/relationships begin to look alike over time has been answered by researchers. In 1987, researchers suggested that spouses’ faces were not similar at the outset of marriage but became more similar, with the “degree of convergence positively correlated with couples’ ratings of marriage quality”. According to the researchers’ hypothesis, couples tend to begin looking alike because they typically “occupy the same environments, engage in the same activities, eat the same food, and mimic each other’s emotional expressions,” all of which can influence facial features. However in a recent study <source> from Stanford, there was this: The widely disseminated convergence in physical appearance hypothesis posits that long-term partners’ facial appearance converges with time due to their shared environment, emotional mimicry, and synchronized activities. Although plausible, this hypothesis is incompatible with empirical findings pertaining to a wide range of other traits—such as personality, intelligence, attitudes, values, and well-being—in which partners show initial similarity but do not converge over time. We solve this conundrum by reexamining this hypothesis using the facial images of 517 couples taken at the beginning of their marriages and 20 to 69 years later. Using two independent methods of estimating their facial similarity (human judgment and a facial recognition algorithm), we show that while spouses’ faces tend to be similar at the beginning of marriage, they do not converge over time, bringing facial appearance in line with other personal characteristics. I had known the 1987 hypothesis, old-wives' tales from before that, and in our own photos, there was indeed a convergence of appearance over the years. How about you ?