Roland Piquepaille writes: "If you want to compare images from human brains with the ones of monkeys, dogs, cats, mice or birds, you should visit the BrainMaps.org website at UC Davis. It contains over 50 terabytes of brain image data directly available online. The researchers have found a way to transform sections of brain mounted on microscope slides into brain maps with a resolution of half a micrometer per pixel, or 55,000 dots per inch. With such a resolution, all the images are fully zoomable. You start with a single section of a brain and you explore it like if you had a virtual microscope. And the site also provides free downloadable tools to see the images in 3-D. Be warned: you might spend lots of time exploring this site. Here are more details about this project and pictures showing how the brain navigating process works and what a barn owl's brain looks like."