Back 1975, American photographer Nicholas Nixon once took a photo of his wife Bebe and her three sisters, and they came up with an idea to make it an annual tradition. Since then, the Brown sisters took a photo every year till 2010. To make the series more coherent, the four sisters – Heather, Mimi, Bebe, and Laurie – always posed in the same order.

As we grow old, we don’t even notice all the small changes that happen to us daily. In her portrait series called Identities, London-based photographer Ana Oliveira observes how people change as they grow older. Ana’s models would provide her with pictures of themselves from the past, and she tries to recreate the original pose, clothing and style. The final combination of the before and now shots are somewhat of a road map of the life that each of the models has traveled.