You’ve most likely seen a few “daily self portrait collections, but how many of them spanned 17 years? Dan Hanna describes his project -

17 years worth of taking 2 photos a day as my head rotates in sync with the Earth around the Sun. This is a non-dejittered, lo-res, highly compressed, preliminary version of a lifetime project. Later versions will have additional imagery throughout. More details are available on my website at:

Watching the hair cycle through repetitive buzz-cuts is by itself quite interesting, not to mention the subtle, gradual changes to his face and jaw. – Dan Hanna [via Kottke]