Dogs have been our companions for thousands of years: Dogs were domesticated from wolves over 15,000 years ago.
They have an incredible sense of smell: Dogs' sense of smell is about 10,000 to 100,000 times more acute than humans'.
Dogs can understand human emotions: They can read facial expressions and body language to understand our feelings.
There are hundreds of dog breeds: The American Kennel Club (AKC) recognizes 197 dog breeds.
Dogs have unique nose prints: Like human fingerprints, a dog's nose print is unique and can be used for identification.
They can dream: Dogs have REM sleep and can dream, often about activities they enjoy.
Puppies are born blind, deaf, and toothless: They rely entirely on their mother and littermates at birth.