http://matt.might.net/articles/phd-school-in-pictures/
Here’s a funny and somewhat sobering infographic about the Ph.D. process, although it could apply just as easily to an entire scientific career. While it’s easy to look at something like this and feel a little insignificant, it’s amazing to think about how many people are simultaneously making their little dents in the big circle of human knowledge, and what the net effect of all of those contributions has been. We may be moving a mountain with a teaspoon, but there are a lot of us with teaspoons!