The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the domestic dog, it was selectively bred from an extinct population of wolves during the Late Pleistocene by hunter-gatherers. The dog was the first species to be domesticated by humans, over 14,000 years ago and before the development of agriculture. Experts estimate that due to their long association with humans, dogs have gained the ability to thrive on a starch-rich diet that would be inadequate for other canids.
Dogs have been bred for desired behaviors, sensory capabilities, and physical attributes. Dog breeds vary widely in shape, size, and color. They have the same number of bones (with the exception of the tail), powerful jaws that house around 42 teeth, and well-developed senses of smell, hearing, and sight. Compared to humans, dogs have an inferior visual acuity, a superior sense of smell, and a relatively large olfactory cortex. They perform many roles for humans, such as hunting, herding, pulling loads, protection, companionship, therapy, aiding disabled people, and assisting police and the military.
Communication in dogs includes eye gaze, facial expression, vocalization, body posture (including movements of bodies and limbs), and gustatory communication (scents, pheromones, and taste). They mark their territories by urinating on them, which is more likely when entering a new environment. Over the millennia, dogs became uniquely adapted to human behavior; this adaptation includes being able to understand and communicate with humans. As such, the human–canine bond has been a topic of frequent study, and dogs' influence on human society has given them the sobriquet of "man's best friend". (Full article...)
Relief of Marquesan Dog on the Tiki Makiʻi Tauʻa Pepe, from the meʻae Iʻipona at Puamaʻu Village, Hiva Oa
The Marquesan Dog or Marquesas Islands Dog is an extinct breed of dog from the Marquesas Islands. Similar to other strains of Polynesian dogs, it was introduced to the Marquesas by the ancestors of the Polynesian people during their migrations. Serving as tribal totems and religious symbols, they were sometimes consumed as meat although less frequently than in other parts of the Pacific because of their scarcity. These native dogs are thought to have become extinct before the arrival of Europeans, who did not record their presence on the islands. Petroglyphic representations of dogs and the archaeological remains of dog bones and burials are the only evidence that the breed ever existed. Modern dog populations on the island are the descendants of foreign breeds later reintroduced in the 19th century as companions for European settlers. (Full article...)
The naming of the modern American hot dog is supposedly influenced by the dachshund. In 1852, the butcher's guild in Frankfurt am Main created a smoked, spiced sausage in a thin casing, dubbed a "little-dog" or "dachshund sausage" for its obvious resemblance to the low-riding German dog. The popular legend on the etymology of hot dog holds that a cartoonist named Tad Dorgan attended a polo match in New York in 1901 where vendors roamed the aisles imploring patrons to "get your red-hot dachshund sausages." Enchanted, Dorgan drew a smiling dachshund nestled in a long bun, but couldn't spell dachshund, so he captioned it "hot dog!" and thus the food got its name.
Image 32A drawing by Konrad Lorenz showing facial expressions of a dog - a communication behavior. X-axis is aggression, y-axis is fear. (from Dog behavior)
Image 47Schematic anatomy of the ear. In dogs, the ear canal has a "L" shape, with the vertical canal (first half) and the horizontal canal (deeper half, ending with the eardrum) (from Dog anatomy)
Image 49Skeleton of a dog: 1. Cranium 2. Maxilla 3. Mandible 4. Atlas 5. Axis 6. Scapula 7. Spine of scapula 8. Humerus 9. Radius 10. Ulna 11. Phalanges 12. Metacarpal bones 13. Carpal bones 14. Sternum 15. Cartilaginous part of the rib 16. Ribs 17. Phalanges 18. Metatarsal bones 19. Tarsal Bones 20. Calcaneus 21. Fibula 22. Tibia 23. Patella 24. Femur 25. Ischium 26. Pelvis (from Dog anatomy)
Image 50The difference in body size between a Cane Corso (Italian mastiff) and a Yorkshire Terrier is over 30-fold; both are members of the same species. (from Dog anatomy)
...that the famous quote "No man who hates dogs and children can be all bad" generally attributed to Leo Rosten was actually first used in 1930 by future war correspondent Byron Darnton?
...that the expressions 'top dog' and 'underdog' may originate with the two sawyers in a saw pit?
...that Fred Gipson was an American author best remembered for creating a fictional dog featured in a book and the classic 1957 movie Old Yeller?
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