... not all, but many of them. What I really like about this set is that the fellow who puts them together often references and links to the source articles or research where the snippets are taken from.
If one of these images (all cc, I asked) strikes you in some way, follow the link back and copy it to the comments here maybe sharing what struck you. I'll start it off below.
I'm not sure if images will embed in the comments here (I'm testing this with my first comment below) but I've got apture installed on my blog so linking to the image should create a popup view of it when you hover over the link; like this.