Scaling and dimensionality are common to all sciences. Which doesn’t necessarily make the concepts any easier to wrap your mind around. For example, its hard to conceive of a 5th dimension (although in EEB, the n-dimensional hyperspace, that is, Hutchinson’s Niche, is taught in Intro Ecology).
Well, puzzle no longer my friends. Here is the most compelling visual explanation of dimensionality that you’ll likely to come across… until…well…the next one. And you’ll be pleased to know that you only have to keep up with 10 dimensions to capture life, the universe, everything. Note, this requires Flash 8 and broadband (tho it could easily be done on with chalk and a blackboard).