Before pugs or Great Danes: Doggie diversity in size and shape began at tail end of Ice Age
These findings contradict the notion that such diversity was mainly a relatively new phenomenon driven by selective breeding in recent centuries.
A Pug dog called Harley, and star of the film "Patrick" poses for photographs at the film's premiere in London, Britain June 27, 2018.(photo credit: PETER NICHOLLS/REUTERS)ByREUTERS
