Tabitha M. Powledge discusses new research on the domestication of man's best friend, the dog: "Humans co-opted the wolf’s allegiance to the pack and an alpha leader, its vigilance in defending territory, its superior sense of smell and its hunting ability, and its enthusiasm for eating any disgusting pile of stuff that came its way." Also, the newest recommendations on when women need mammograms: "The biggest risk from mammograms is overdiagnosis and overtreatment."
October 24, 2015
