The evolution of the smile captured in 100 years of yearbook photos

By Inga Ting
Updated December 3 2015 - 10:08am, first published November 27 2015 - 8:18pm
The evolution of the smile throughout the 20th century. Photo: Ginosar et al. 2015
The evolution of the smile throughout the 20th century. Photo: Ginosar et al. 2015

We take it for granted that, when someone takes our photo, we should smile for the camera. But if Instagram had existed a century ago, it's highly likely that stone-faced selfies rather than the beaming faces would dominate our photo feeds.

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