[Photograph by Robert Clark] How to Build a Dog -- Scientists have found the secret recipe behind the spectacular variety of dog shapes and sizes, and it could help unravel the complexity of human genetic disease by Evan Ratliff
"Dog genes are telling a radically different story from dog bones. An analysis in the June 13 Science concludes that dogs were domesticated much earlier than archaeologists maintain. Instead of a 10,000- to 20,000-year time frame, Robert K. Wayne of the University of California, Los Angeles and his colleagues now have evidence that dogs could have been domesticated 100,000 years ago -- if not earlier."