The dog or domestic dog is a domesticated descendant of the grey wolf. It has many notable characteristics, the most prominent of which is the upturning tail. The dog derived from an ancient, extinct wolf. Today, the modern grey wolf is the dog's nearest living relative. Experts assert that the dog was the first species to be domesticated. It is believed that domestication took place over 15,000 years ago and was performed by hunter–gatherers 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.Over the millennia, dogs became uniquely adapted to human behavior, and the human-canine bond has been a topic of frequent study. 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.

Read more in the app

This Morning today: Woman criticised for dyeing dog bright colours

I'm A Celebrity fans praise Paulini Curuenavuli for downing drink made of fish brains and dog hair

Loose Women: Paris Fury sparks backlash as she admits she’d be ‘pleased’ if her dog wasn’t around

Carol Wright enjoys a dog walk with daughters Jess and Natalya after coronavirus

Lucy Hale keeps it casual in black and grey look as she takes dog Elvis for a hike in Studio City

Kaley Cuoco receives outpouring of condolence gifts after the loss of her beloved dog Norman

The Crown's Emma Corrin shows off her laid back casual style in plaid coat on dog walk

Stella Maxwell shows love for the Lakers as she steps out with a friend to walk her dog in LA

Miranda Hart reveals heartache as beloved dog Peggy has died

Katy Perry says she and her dog Nugget are nearly ready to go vegan and ready 'to be open to better'

Josh Groban performs in 'Indoguration Ceremony' to honor President-elect Joe Biden's dog Major

Naomi Watts is spotted on a dog walk in New York City as she FaceTimes her famous boyfriend

Josh Groban Performs at Joe Biden's Dog's 'Indoguration'

Kaley Cuoco mourns the death of her dog Norman

Kaley Cuoco Feels "Gut Wrenching Pain" After the Death of Her Beloved Dog Norman

Kaley Cuoco's Dog, Norman, Dies

Pregnant Laura Whitmore bundles joins husband Iain Stirling on a dog walk

Kaley Cuoco Is in 'Gut Wrenching Pain' Over the Death of Her Dog Norman

Hailey Baldwin Shows Off Her Intense Pilates Routine Alongside Adorable Dog Oscar — Watch

Camila Alves reveals she and Matthew McConaughey have adopted yet ANOTHER dog