Russell's Teapot or the Celestial Teapot was an analogy devised by the philosopher Bertrand Russell intended to refute the idea that the burden of proof lies upon the skeptic to disprove the claims of religions.
Even though I usually do identify as agnostic (because the key point of my nonbelief isn't so much that I don't believe that there's a god or gods, but that I don't believe that any human interpretation of such can be considered divinely inspired in any way), I still like his point about how he has the right to live his life free of the assumption that there is a god out there, when possessing no such knowledge.
Scale of Universe - Interactive Scale of the Universe Tool. This is a zooming tool like prezi which you can use to compare the relative size of things in the universe. Also information about the universe on this site.