Dogs, domesticated 20,000-40,000 years ago, have been kept as pets for millennia, according to scientists.
Greyhounds, the fastest dog breed, can sprint at an incredible speed of 45 mph!
therapy dogs provide company, police dogs sniff out clues, service dogs assist the blind and detect medical emergencies.
Over 200 dog breeds exist. Spot popular ones like Golden Retriever, German Shepherd, Bulldog, Dachshund, and Yorkshire Terrier.
tallest dog, up to 86cm tall. English Mastiff: heaviest dog, 200-230 pounds.
smallest breed, 6-9in tall, 2-6lbs.
Dogs' wet noses come from mucus glands that absorb scents, enhancing their incredible sense of smell.
Don't feed dogs chocolate; it's toxic due to theobromine. They can't process it like humans, leading to stomach issues.