This post is entirely frivolous. But it's short, so please read it anyway.
I found a picture of a "glass frog" (Hyalinobatrachium pellucidum) on BBC News today. It's the 5th image in this slide show. I don't know when, or if, those slideshow URLs expire, but if it does then you can still find some decent pictures with a search on Google (look for one showing the underbelly).
That's just so cool.