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Article

Physicians for Global Survival (Canada)

Physicians for Global Survival (Canada) (originally Physicians for Social Responsibility) is a voluntary nonprofit organization dedicated to the prevention of nuclear war. It came into being largely as the result of the efforts of the founding president, Dr Frank Sommers.
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Article

Physics

Physics is the study of matter and radiation, the space-time continuum that contains them, and the forces to which they are subject. Physics may be experimental, observing the behaviour of matter and radiation under various conditions, using increasingly sophisticated instruments; or it may be theoretical, using mathematical tools to construct models, to formulate laws governing observed behaviour and to indicate (on the basis of these models and laws) promising avenues for further experimentation. The terms macroscopic and microscopic (or, more accurately, submicroscopic), and "classical" and "modern," refer to aspects of physics characterized by different scales in the phenomena studied. Macroscopic or classical physics deals with matter in bulk, as solids, liquids or gases.
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Article

Physiographic Regions

Canada may be divided into seven physiographic regions. The Canadian Shield is the largest and oldest of these regions. The other six physiographic regions are younger and form two concentric rings around the Canadian Shield. The outer, older ring contains the Western Cordillera, Canadian Arctic and Appalachian Region. The second, younger ring contains the Interior Plains, Hudson Bay Lowlands and the St. Lawrence Lowlands. These regions may be further sub-divided based on their structure, relief and the presence or absence of permafrost and forest cover (see Natural Regions). Areas quoted for these regions are the land areas and do not include adjacent continental shelves or bodies of ocean water within Canada's territorial limits. Readers should also note that the abbreviation “masl” stands for “metres above sea level.” Click here for definitions of key terms used in this article. This article is a full-length entry about physiographic regions. For a plain-language summary, please see Physiographic Regions (Plain-Language Summary).
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Article

Piano Playing and Teaching

The piano has maintained a position of prominence in many Canadian homes since the late 18th century. Canadians have thrived on this instrument, and Canada has produced some of the best pianists, piano instructors, and piano methods in the latter part of the 20th century.
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Article

Pickerel in Canada

Pickerel is the common name for three closely related carnivorous, soft-rayed freshwater fishes in the pike family (Esocidae). In parts of Canada, the name is applied, erroneously, to the walleye. The name is derived from an English diminutive of pike.
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Macleans

Pickton Preliminary Hearing

DAWN SANGRET, 19 years a resident of Port Coquitlam, B.C., arrives at the city's provincial court last week seeking answers. "I have my suspicions about a lot of things," she says.This article was originally published in Maclean's Magazine on January 27, 2003
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Article

Pictographs and Petroglyphs

Rock art is generally divided in two categories: carving sites (petroglyphs) and paintings sites (pictographs). Pictographs are paintings that were made by applying red ochre or, less commonly, black, white or yellow dye. Although the majority of the images were traced with the finger, some could be executed with brushes made of animal or vegetal fibres. Petroglyphs are carvings that are incised, abraded or ground by means of stone tools upon cliff walls, boulders and flat bedrock surfaces.
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Article

Pictographs and Petroglyphs in Ontario

Pictographs and petroglyphs represent the First Peoples. They bridge the past and present through stone-carved and painted stories in what is known today as Ontario. These ancient artworks are found in locations like Petroglyphs Provincial Park, the largest known site of its kind in Canada. They offer invaluable insights into the spiritual, cultural and daily lives of their creators. They are not merely historical artifacts but are infused with cultural significance and spiritual relevance for Indigenous communities today. These sites are found throughout the province, especially along major rivers and waterbodies.
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Article

Pier 21

Pier 21 was an immigration depot on the Halifax harbourfront that operated from 1928 to 1971.
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Article

The Pig War

The “Pig War” of 1859 was a confrontation between the United States and Great Britain over the location of the international border in the San Juan Islands. The conflict began when an American settler killed a pig owned by an employee of the Hudson’s Bay Company; it quickly grew to involve British warships and hundreds of troops on both sides. The root of the conflict was an earlier compromise between the two nations that resulted in American and British settlers sharing the disputed islands. Though called a war, it never actually degenerated into an armed conflict, and there were no human casualties. In late 1859, the two sides agreed to a joint military occupation of the islands; this lasted until 1872, when the San Juan Islands became part of US territory.
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Article

Pigeon

The pigeon (Columbidae) is a large family (303 species) of birds, many of which are called doves, distributed throughout temperate and tropical areas worldwide.
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Article

Pika

Pika is a common name for the smallest members of the order Lagomorpha, which also includes rabbits and hares. Pikas are like guinea pigs in size and shape, have relatively short legs, no external tail and almost circular, prominent external ears.
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Article

Pike

Pike is the common name for the group of 5 species of predaceous freshwater fish with elongated snouts, sharp teeth, cylindrical bodies and forked tails, belonging to family Esocidae, order Esociformes, class Actinopterygii.
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Article

Pine Trees in Canada

Canada is home to 10 species of pine trees. Distinguishable by their bundles of two, three or five needles, various species can be found throughout Canada’s provinces and the Yukon and Northwest Territories. These conifers can live for hundreds of years, with the oldest pine tree in the world being around 4,900 years old and located in Nevada. Two pine species are designated provincial trees in Canada: the lodgepole pine in Alberta and the eastern white pine in Ontario.
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Article

Pingo

A pingo is an ice-cored hill typically conical in shape, growing and persisting only in PERMAFROST. The word "pingo" is of Inuit origin and was first used in the English-language literature by the botanist Alf E.
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