I've been fascinated with HDR since I was first introduced to it about a year ago. HDR is High Dynamic Range photography, the merging of three photos of the same scene taken with different exposures. The blending allows you to get more detail in the scene.
While most HDRs are of outdoor scenery, I played with this photo of cousin's cat. I loved the many colors in the shot, and blending the three exposures allows for maximum exposure of the different colors and patterns.