Evolution of the Smile Mapped through 100 years of Yearbooks

The year book, staple souvenir of any American school kid born in the last century is the subject of a study undertaken by university researchers into the way our smile has changed over time.

The study analysed almost 38,000 unique frontal-facing portraits taken from American high school year books to compile an impressive snapshot of each decade since the year 1900.

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Because of the photographic typology of the portraits contained within they are perfect for computational data Continue reading

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