The Scale of the Universe infographic is an interactive diagram which does exactly what it says on the tin. It allows the user to view the different scale of object in the known universe. This idea has stripped down the a hugely complex system like the universe and managed to present a wealth of knowledge in a simple and effective manner. By just focusing on size and placing them in order it makes for a story that everyone can understand. The creators have focused on one thing and done it to a very high quality.
The aspect which makes this infographic memorable is the fact it is interactive, allowing the user to have a degree of control over the way they use the graphic makes it easier to understand and lets the viewer engage with the data in their own way. This way get the story of the scale of the universe but specifically they get detailed stories (e.g. how big a Human is to a Japanese Spider Crab) The biggest problem is that your only limit is what objects the creators chose and that you are limited to the scope of your screen.
Have a play and see what you think.