The discovery of the oldest ever dog DNA suggests they have been our best friends for nearly 16,000 years – 5,000 years earlier than had previously been thought, new research said Wednesday. Despite being ubiquitous in the homes, backyards and hearts of people across the world, surprisingly little is known about where dogs come from. "It's just an interesting mystery," Swedish geneticist Pontus Skoglund of the UK's Francis Crick Institute told reporters. Dogs are most likely a mix of two types

Tag-uri: DNA