The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the domestic dog, it is derived from the extinctPleistocene wolf; the gray wolf is the dog's closest living relative. The dog was the first species to be domesticated by humans. Experts estimate that hunter-gatherers domesticated dogs more than 15,000 years ago, which was 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.
"Water Spaniel" (most widely accepted image of a Tweed Spaniel)
The Tweed Water Spaniel, or Tweed Spaniel, is a breed of dogextinct since the 19th century. It is best known for being involved in the early development of the modern Curly Coated Retriever and Golden Retriever breeds of dogs. They were described as generally brown, athletic dogs from the area around Berwick-upon-Tweed near the River Tweed and close to the Scottish Borders. A type of water dog, the breed was not well known outside the local area. This breed may have been created by crossing local water dogs with imported St. John's water dog, another breed which is also now extinct. (Full article...)
A team of fourteen mixed-breed dogs mushing. Mushing is a general term for a sport or transport method powered by dogs, and includes carting, sled dog racing, skijoring, freighting, and weight pulling. More specifically, it implies the use of one or more dogs to pull a sled on snow. The term is thought to come from the French word marche, or go, run, the command to the team to commence pulling. "Mush!" is rarely used in modern parlance, however; "Hike!" is more common in English.
Dog intelligence or dog cognition is the process in dogs of acquiring information and conceptual skills, and storing them in memory, retrieving, combining and comparing them, and using them in new situations.
Studies have shown that dogs display many behaviors associated with intelligence. They have advanced memory skills, and are able to read and react appropriately to human body language such as gesturing and pointing, and to understand human voice commands. Dogs demonstrate a theory of mind by engaging in deception, and self-awareness by detecting their own smell during the "sniff test", a proposed olfactory equivalent to the mirror test. (Full article...)
Image 2A 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 14The 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)
Image 16Schematic 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)
... that Mack Trucks adopted the Bulldog as its corporate logo after World War I British soldiers nicknamed the Mack AC the "Bulldog", a reference to the model's tenacity and stub nose?
...that Mancs the Hungarian rescue dog is commemorated by a statue (pictured) in his hometown Miskolc?
...that the sting of the rainforest shrub Dendrocnide moroides can cause severe and prolonged pain and has been reported to kill dogs, horses and humans?
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