Well, check out my new one anyways:
Every year, the Division of Research and Graduate Studies at Texas A&M (whoop!!!) publishes an annual report titled Profile. This year, they took some of the images from the report and created a calendar, and then turned them into ready-for-download desktop images. Cool, eh? So if you've run through all 3,115 of those LoC images (which I haven't, but you know, it's feasible...), you can head over and get one of the Profile 2007 ones.
I picked Thin Section, which comes with this description:
A sample of hardrock attached to a glass slide, polished to a thickness of several microns and viewed with cross polarized light. Colors are determined by the minerals that are present. This is a research sample from Texas A&M's Integrated Ocean Drilling Program.I love the colors, and the way the crystals slant. It was hard to choose though; next up I might pick the mouse neurons (so stinkin' cool), or the 3-D stereo-optic spiral (because I totally know what stereo-optic means, don't you?), or the transgenic cotton plant (again with the big words!), or, well, any of them! (Click on the main page to see the descriptions.)
Hope you enjoy, and Happy Mardi Gras!!! =)