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Dog
The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the gray wolf. Also called the domestic dog, it was selectively bred from a 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. 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 possess a superior sense of smell and hearing, but inferior visual acuity. Dogs perform many roles for humans, such as hunting, herding, pullin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Dogs In Warfare
Dogs have a very long history in warfare, beginning in Domestication of the dog, ancient times. From being trained in combat, to their use as scouts, sentries, Courier, messengers, mercy dogs, and Tracking (dog), trackers, their uses have been varied, and some continue to exist in modern military usage. History War dogs were used by the Egyptians, Greeks, Persians, Sarmatians, Baganda, Alans, Slavs, Britons (historical), Britons, and Ancient Rome, Romans. Among the Greeks and Romans, dogs served most often as sentries or patrols, though they were sometimes taken into battle. The earliest use of war dogs in a battle recorded in classical sources was by Alyattes of Lydia against the Cimmerians around 600 BC. The Lydian dogs killed some invaders and routed others. At the Battle of Pelusium (525 BC), Cambyses II, Cambyses II deployed dogs, cats, and other animals held sacred by the Egyptians. By putting these animals on the front lines, he was supposedly able to get the Eg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Dog Communication
Dog communication refers to the methods dogs use to transfer information to other dogs, animals, and humans. Dogs may exchange information vocally, visually, or through smell. Visual communication includes mouth shape and head position, licking and Sniffing (behavior), sniffing, ear and tail positioning, eye gaze, eye contact, facial expression, and Body language, body posture. Auditory communication can include bark (sound), barks, growling, growls, howling, howls, whines and whimpers, screams, pants and sighs. Dogs also communicate via gustatory communication, utilizing scent and pheromones. Humans can communicate with dogs through a wide variety of methods. Broadly, this includes vocalization, hand signals, body posture and touch. The two species also communicate visually. Through domestication, dogs have become particularly adept at "reading" human facial expressions. Dogs recognise and infer emotional information from humans. When communicating with a human, their level of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Late Pleistocene
The Late Pleistocene is an unofficial Age (geology), age in the international geologic timescale in chronostratigraphy, also known as the Upper Pleistocene from a Stratigraphy, stratigraphic perspective. It is intended to be the fourth division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently defined as the time between 129,000 and c. 11,700 years ago. The late Pleistocene equates to the proposed Tarantian Age of the geologic time scale, preceded by the officially ratified Chibanian (commonly known as the Middle Pleistocene). The beginning of the Late Pleistocene is the transition between the end of the Penultimate Glacial Period and the beginning of the Last Interglacial around 130,000 years ago (corresponding with the beginning of Marine Isotope Stage 5). The Late Pleistocene ends with the termination of the Younger Dryas, some 10th millennium BC, 11,700 years ago when the Holocene Epoch began. The term Upper Pleistocene is currently in use as a p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Herding Dog
A herding dog, also known as a stock dog or working dog, is a Dog type, type of dog that either has been trained in herding livestock or belongs to one of the dog breed, breeds that were developed for herding. A dog specifically trained to herd sheep is known as a sheep dog or shepherd dog, and one trained to herd cattle is known as a cattle dog or cow dog. Herding behavior All herding behavior is modified predatory behavior. Through selective breeding, humans have been able to minimize the dog's natural inclination to treat cattle and sheep as prey while simultaneously maintaining the dog's hunting skills, thereby creating an effective herding dog. Dogs can work other animals in a variety of ways. Some breeds, such as the Australian Cattle Dog, typically nip at the heels of animals (for this reason they are called ''heelers'') and the Cardigan Welsh Corgi, Cardigan and Pembroke Welsh Corgis were historically used in a similar fashion in the cattle droves that moved cattle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gray Wolf
The wolf (''Canis lupus''; : wolves), also known as the grey wolf or gray wolf, is a canine native to Eurasia and North America. More than thirty subspecies of ''Canis lupus'' have been recognized, including the dog and dingo, though grey wolves, as popularly understood, only comprise naturally-occurring wild subspecies. The wolf is the largest wild extant member of the family Canidae, and is further distinguished from other '' Canis'' species by its less pointed ears and muzzle, as well as a shorter torso and a longer tail. The wolf is nonetheless related closely enough to smaller ''Canis'' species, such as the coyote and the golden jackal, to produce fertile hybrids with them. The wolf's fur is usually mottled white, brown, grey, and black, although subspecies in the arctic region may be nearly all white. Of all members of the genus ''Canis'', the wolf is most specialized for cooperative game hunting as demonstrated by its physical adaptations to tackling large p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Million Years Ago
Million years ago, abbreviated as Mya, Myr (megayear) or Ma (megaannum), is a unit of time equal to (i.e. years), or approximately 31.6 teraseconds. Usage Myr is in common use in fields such as Earth science and cosmology. Myr is also used with Mya or Ma. Together they make a reference system, one to a quantity, the other to a particular point in a year numbering system that is ''time before the present''. Myr is deprecated in geology, but in astronomy ''Myr'' is standard. Where "myr" ''is'' seen in geology, it is usually "Myr" (a unit of mega-years). In astronomy, it is usually "Myr" (Million years). Debate In geology, a debate remains open concerning the use of ''Myr'' (duration) plus ''Mya'' (million years ago) versus using only the term ''Ma''. In either case, the term '' Ma'' is used in geology literature conforming to ISO 31-1 (now ISO 80000-3) and NIST 811 recommended practices. Traditional style geology literature is written: The "ago" is implied, so that any s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Cosmopolitan Distribution
In biogeography, a cosmopolitan distribution is the range of a taxon that extends across most or all of the surface of the Earth, in appropriate habitats; most cosmopolitan species are known to be highly adaptable to a range of climatic and environmental conditions, though this is not always so. Killer whales ( orcas) are among the most well-known cosmopolitan species on the planet, as they maintain several different resident and transient (migratory) populations in every major oceanic body on Earth, from the Arctic Circle to Antarctica and every coastal and open-water region in-between. Such a taxon (usually a species) is said to have a ''cosmopolitan'' distribution, or exhibit cosmopolitanism, as a species; another example, the rock dove (commonly referred to as a ' pigeon'), in addition to having been bred domestically for centuries, now occurs in most urban areas around the world. The extreme opposite of a cosmopolitan species is an endemic (native) species, or one foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Man's Best Friend
"Man's best friend" is a common title given to both domestic dogs, referring to their multi-millennia-long history of Human-canine bond, close relations, loyalty, friendship, and companionship with humans. The first recorded use of a related phrase is by Frederick the Great of Prussia. It was likely popularized by its use in a poem by Ogden Nash and has since become a common colloquialism. Before the 19th century, breeds of dogs (other than lap dogs) were largely functional. They performed activities such as hunting, tracking, watching, protecting and guarding; and language describing the dog often reflected these roles. According to the ''Oxford English Dictionary'', "In the oldest proverbs and phrases dogs are rarely depicted as faithful or as man's best friend, but as vicious, ravening, or watchful." Beginning in the 18th century, multiplying in the 19th and flourishing in the 20th century, language and attitudes towards dogs began to shift. Origins A statement describing a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sobriquet
A sobriquet ( ) is a descriptive nickname, sometimes assumed, but often given by another. A sobriquet is distinct from a pseudonym in that it is typically a familiar name used in place of a real name without the need for explanation; it may become more familiar than the original name. An example is Mohandas Gandhi, who is better known as Mahatma Gandhi ("mahatma" means "great soul" in Sanskrit). The term ''sobriquet'' is equally applicable as a name for a person, group of people, historical event, or place. Well-known places often have sobriquets, such as New York City, often called the " Big Apple", or Rome, the "Eternal City", or Vienna, the "Golden Apple". Etymology The modern French and English spelling is . Two earlier variants are and . The first variant, "soubriquet", dates from the 15th century and is rarely used now, in English or French. The early 14th-century ''soubzsbriquez'' meant a "little blow under the chin" in French, also described as a chuck under the ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Human–canine Bond
The human–canine bond is rooted in the domestication of the dog, which began occurring through their long-term association with Hunter-gatherer, hunter-gatherers more than 30,000–40,000 years ago. The earliest known relationship between Dog, dogs and Human, humans is attested by the 1914 discovery of the Bonn–Oberkassel dog, who was buried alongside two humans in modern-day Oberkassel, Bonn, Oberkassel, Germany, approximately 15,000 years ago. For centuries, the phrase "man's best friend" has commonly been used to refer to dogs, as they were the first species and the only large carnivore to have been domesticated. This companionship is most evident in Western world, Western countries, such as the Dogs in the United States, United States, where 44% of households were found to be keeping at least one dog as a pet. On average, female humans tend to have more positive attitudes towards dogs than male humans do, but studies have demonstrated that both dogs and humans release oxyto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Police Dog
A police dog, also known as a K-9 (phonemic abbreviation of canine), is a dog that is trained to assist police and other law enforcement officers. Their duties may include searching for drugs and explosives, locating missing people, finding crime scene evidence, protecting officers and other people, and attacking suspects who flee from officers. The breeds most commonly used by law enforcement are the German Shepherd, Belgian Malinois, Bloodhound, Dutch Shepherd, and Labrador Retriever. In recent years, the Belgian Malinois has become the leading choice for police and military work due to their intense drive, focus, agility, and smaller size, though German Shepherds remain the breed most associated with law enforcement. Police dogs are used on a federal and local level for law enforcement purposes in many parts of the world. They are often assigned to what in some nations is referred to as a K-9 Unit, with a specific handler, and must remember several verbal cues and h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Service Dog
An assistance dog is a dog that receives specialized training to aid an individual with a disability in navigating everyday life. Assistance dogs can be trained by an organization, or by their handler. Terminology 'Assistance dog' is the internationally established term for a dog that provides assistance to a disabled person and is task-trained to help mitigate the handler's disability. In the United States, assistance dogs are also commonly referred to as 'service dogs'. Assistance dogs are not emotional support animals (ESAs), which are generally not protected by the same laws and typically have little to no training compared to an assistance or service dog. Assistance dogs and ESAs are also both distinct from Therapy dog, therapy dogs. While therapy dogs are required to undergo training and become certified, they work for people other than their handler and are not covered by laws such as the US Americans with Disabilities Act of 1990, Americans with Disabilities Act. Dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
