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…

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.

The discovery of the oldest ever canine DNA suggests dogs may have been man's best friend for 16,000 years, according to new research published on Wednesday.