Dark eyes are more common in domesticated dogs, possibly because we consider this trait more friendly
Human preferences for a friendly face may have steered the evolution of canine eye colour, researchers have suggested.
Ever since canines were domesticated, some time between 15,000 and 50,000 years ago, humans have selected – whether consciously or not – particular traits in their dogs.
More Stories
Virologist Wendy Barclay: ‘Wild avian viruses are mixing up their genetics all the time. It’s like viral sex on steroids’
Microsoft unveils chip it says could bring quantum computing within years
Athena spacecraft lands on moon 100 miles from south pole after tense descent