Remember our post about the Swedish photographer who took a photo of his now-teens every week of their lives starting at infancy and turned those projects into photo exhibits in a museum?

Here is another one:  Nicholas Nixon snapped his wife and her sisters every year from 1975 to beyond 2010. That’s over 40 years!

The idea came to Nixon when he visited his wife’s family in the summer of 1975.  He asked all four sisters – left to right: Heather, Mimi, BeBe, and Laurie – to pose for a photo with each other. Next year, at one of the sisters’ graduation, he asked for another photo in the same order. After that, Nixon has taken snapshots of the siblings every year to document their growing up and aging together.

These photos were exhibited at the Museum of Modern Art in New York City in a a collection that went along with the publication of the museum’s book, The Brown Sisters: Forty Years, that was released in November 2014.