Information is Beautiful tackles the most common misconceptions (another form of contagion). I love the data visualization at this site: they are able to convey so much information in such a simple and eloquent way. In this infographic, different topics are different colors, and the size of the bubble is determined by the number of google hits associated with that particular idea (myth).
For the full-size image, click here.
For the full-size image, click here.