Canines

In the world of dog owners, there's a perception that purebreds suffer more health woes than their tougher mixed-breed cohorts. A new study casts doubt on that assumption and cautions against using it as the basis for choosing your new best friend.

Scientists at the University of Buffalo have found a very useful clue shedding light on the migration of canines to the Americas, in the DNA of an ancient bone fragment thought to be the oldest confirmed dog remains in the region.