The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the domestic dog, it was domesticated from an extinct population of Pleistocene wolves over 14,000 years ago. 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.
A yellow Labrador Retriever correctly negotiating weave poles at a dog agility competition. Similar to a slalom, weave poles are a series of upright poles, each about 3 feet (1 m) tall and spaced about 20 inches (50 cm) apart, through which the dog weaves. It is one of the most difficult obstacles for a dog to master. It varies from 5 to 12 poles at one time. The dog must always enter with the first pole to his left and must not skip poles.
A sled dog is a dog trained and used to pull a land vehicle in harness, most commonly a sled over snow.
Sled dogs have been used in the Arctic for at least 8,000 years and, along with watercraft, were the only transportation in Arctic areas until the introduction of semi-trailer trucks, snowmobiles and airplanes in the 20th century, hauling supplies in areas that were inaccessible by other methods. They were used with varying success in the explorations of both poles, as well as during the Alaskan gold rush. Sled dog teams delivered mail to rural communities in Alaska, Yukon, Northwest Territories and Nunavut. Sled dogs today are still used by some rural communities, especially in areas of Russia, Canada, and Alaska as well as much of Greenland. They are used for recreational purposes and racing events, such as the Iditarod Trail and the Yukon Quest. (Full article...)
Image 23The 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 41A 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 56Lateral view of a dog skeleton (from Dog anatomy)
Image 57Schematic 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 according to legend, dogs who travelled through a passage between Piper's Hole in Tresco and Piper's Hole in St Mary's emerged without most of their fur?
...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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