Jan Diehm

How difficult was it to obtain artificial light before the 19th century? Well...

How does color influence our perception of time?

She's been having a moment — and that's not a good thing. Using baby name data, we found other names that are equally as “Karen” as Karen.

We investigated a dataset of more than 30,000 high school yearbook photos from 1930–2013 to find out when big hair was at its height.

Every four years, political parties document their positions in written platforms. How often do women's issues appear in the text?

An analysis of 12 decades of New York Times headlines.