We may have inadvertently selected for muscles on dogs’ faces
Enlarge / A muscle flex raises the inner portions of the eyebrow at right. (credit: Waller et al.) Humans domesticated dogs about 30,000 years ago. Since then, we’ve worked with…
ANALYSIS
Enlarge / A muscle flex raises the inner portions of the eyebrow at right. (credit: Waller et al.) Humans domesticated dogs about 30,000 years ago. Since then, we’ve worked with…