There's a wicked post over on Michael Surtees' blog, DesignNotes... an excerpt from Michael's post:
For thirty six days now I’ve been taking an image of the sky from my apartment in Manhattan. It wasn’t until I started noticing that most mornings have a really unique colour to the sky that I thought there might be something to comparing the colour day to day...
I think it's an excellent visual experiment that anyone with a digital camera could/should attempt. Keep up the great work Michael - Cheers!
View the original 36 Days of New York Sky image on Flickr here.