How old is the world’s oldest dog breed? More specifically–what was the first dog on earth? Here are some ancient dog breeds ...

An Ontario woman said she believes her Yorkshire terrier, standing at just 3 inches tall and weighing less than a pound, might be the smallest dog in the world.

A 166-million-year-old Middle Jurassic herbivorous dinosaur, the size of a large dog and bipedal, has been discovered on the ...

Learn more about the gene families that play an important role in the aging and longevity of mammals, including humans.

Katie Elkin told Newsweek that it was "a perfect representation" of the bond between her dad and Chandler the dog.

Reggie, the world’s tallest dog, and Pearl, the world’s shortest dog, recently met for an unforgettable playdate. The event, ...