Nature has just released a free PDF file that summarizes some historic evidence for evolution:
Readers will find at http://www.nature.com/evolutiongems a freely accessible resource for biologists and others who wish to explain to students, friends or loved ones just what is the evidence for evolution by natural selection. Entitled ’15 evolutionary gems’, the document summarizes 15 lines of evidence from papers published in Nature over the past 10 years. The evidence is drawn from the fossil record, from studies of natural and artificial habitats, and from research on molecular biological processes.
Download your copy now! Each “Gem” has a brief description, and then references to the primary research article that describes it. It does not, however, contain the actual papers–you still have to have a subscription to Nature to see them. Rats!