a terrific site from the University of California Museum of Paleontology. If you are at all unclear about what is evolution and how does it work?, are having sleepless nights about how evolution impacts on your life, are going hairless as a naked ape wondering what is the evidence for evolution or wish to swot up on the history of evolutionary thought, or are on rocky ground about the science of evolution this is a good place to go. Here's one of the many gems in the "misconceptions about evolution" section:
Clear, elegant, the finest kind of science writing. Sou'wester tip to Kevin at The Other 95% for the link.