The dog is a domesticated descendant of the wolf. Also
called the domestic dog, it is derived from the extinct Pleistocene
wolf, and the modern wolf is the dog's nearest living relative. Dogs
were the first species to be domesticated by hunter-gatherers over
15,000 years ago before the development of agriculture. Due to their
long association with humans, dogs have expanded to a large number of
domestic individuals and gained the ability to thrive on a starch-rich
diet that would be inadequate for other canids. The dog has been
selectively bred over millennia for various behaviors, sensory
capabilities, and physical attributes. Dog breeds vary widely in
shape, size, and
color. They perform many roles for humans,
such as hunting, herding, pulling loads, protection, assisting police
and the military, companionship, therapy, and aiding disabled people. ๐โ๐ฆบ
Over the millennia, dogs became uniquely adapted to human behavior, and
the human-canine bond has been a topic of frequent study. This influence
on human society has given them the sobriquet of
"man's best friend".