夫妻会越长越像吗？科学研究发现真相其实是……

在日常生活中，相信不少人都听过“夫妻相”这个词。

近日，有外媒指出，科学研究显示“我们倾向于选择与我们长得像的伴侣。”

人倾向选择与自己长得像的伴侣

据《科学焦点》杂志（Science Focus），有大量研究表明，长期伴侣往往看上去很像。

但这是否是由于他们一开始就长得像？还是因为随着时间推移，他们变得越来越像（more similar-looking）？亦或是因为共同的饮食（shared diets）、生活方式（lifestyles）、言谈举止（mannerisms）或其他一些因素？

A team of researchers from Stanford University in the US put together a database of pictures of 517 couples, taken soon after getting married and then decades later.

Using advanced facial recognition software and human judges, they showed that although long-term couples do tend to look alike, they don’t become more alike over time. In other words, this study supports the claim that we tend to choose partners who look like us.

同居伴侣的皮肤微生物群会越来越像

不过，尽管我们在外表上可能不会变得越来越像，但多年后我们的皮肤微生物群肯定会更像。

在几年前进行的一项研究中，科学家决定分析同居伴侣的皮肤微生物群。他们发现共同生活会大大影响彼此皮肤上的微生物群。

研究人员发现，共同生活对微生物群落的影响是十分巨大的，以至于计算机算法能够仅靠皮肤微生物群就确定同居伴侣，且准确性达到86%。

The impact of living together on their microbial community was so strong that computer algorithms could identify cohabiting couples with 86 percent accuracy based on their skin microbiomes alone.

该研究还指出，同居伴侣身体上微生物群最相似的部位是脚。这是因为很多人会光着脚在家里走来走去。

The area of the body where cohabiting couples were the most alike, microbe-wise, was the feet. This is not altogether surprising as many of us will pad around our homes barefooted.