i thought this was a very fun, informative article! (this coming from a person who goes ugh when people squee over kitties).

perhaps could have had a few more pics or illustrations in there. just a note; you should be crediting all of your photo sources, even if they are your own, just for clarity and transparency sake. theres a markup for sub type that might help there. Also, look into other markup techniques like headers and lines.

great job!