The News
Gene tied to size identified in dogs
By Donald G. McNeil Jr. The New York Times
Article Launched: 04/06/2007 01:00:00 AM MDT
If it weren't for IGF-1, Paris Hilton's life would be a lot less elegant. She'd be lugging around an Irish wolfhound in her purse.
Scientists have just discovered which gene fragment controls the size of dogs, the mammal with the greatest range in size.
No other species produces adults with 100-fold differences, like that between a 2-pound Chihuahua and a 200-pound Newfoundland.

The Research
Read the research behind this story in the journal Science.