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Oyster
Oyster is a common name for bivalve (hinged shell) molluscs, including true oysters (order Ostreoida) and tropical pearl oysters (order Pterioida), found chiefly in temperate and warm shallow waters.
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Oystercatcher
Oystercatcher is a name given to 11 species of large shorebirds of the family Haematopodidae.
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Ozone Depletion
Ozone depletion is a chemical thinning of the OZONE LAYER in the stratosphere or upper atmosphere. Scientists determined in the 1970s that it is caused by ozone depleting substances (ODSs), particularly by the use of chlorofluorocarbons (CFCs).
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Ozone Layer
The development of the ozone layer is thought to have been a significant factor permitting the evolution of life on Earth. Ozone is the main atmospheric gas that absorbs the biologically damaging part of the sun's ultraviolet radiation (UV radiation), known as UV-B (ultraviolet-biologically active).
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Paardeberg Day
The Battle of Paardeberg was the first time men in Canadian uniform, fighting in a Canadian unit, made war overseas. It also inspired one of the first remembrance ceremonies in Canada: from 1900 until the end of the First World War, Canadians gathered not on November 11, but on February 27 — Paardeberg Day — to commemorate the country’s war dead and its achievements in South Africa (see also Remembrance Day in Canada).
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Pablum
Pablum is a multi-grain processed cereal developed as a nutritious, precooked digestible food for infants. The cereal was first developed at the Hospital for Sick Children in Toronto in 1930 by pediatric doctors Theodore Drake and Frederick Tisdall under the supervision of physician-in-chief Alan Brown. Pablum became commercially available in 1934 through an agreement with the Mead Johnson & Company and was used as a brand name through the early 21st century.
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Pacific Fur Company
The Pacific Fur Company was established on 23 June 1810 and headed by New York fur dealer John Jacob Astor. Principal partners included ex-Nor'Westers Alexander McKay, Donald McKenzie and Duncan McDougall.
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Pacific Ocean and Canada
The Pacific Ocean is the world’s largest ocean. It covers more than 30 per cent of the Earth’s surface — an area roughly the same as the Atlantic and Indian oceans combined. Canada’s relationship with the Pacific Ocean is synonymous with the West Coast of British Columbia. The province’s entire ocean shoreline, including the coasts of Vancouver Island and Haida Gwaii, form Canada’s Pacific coastal region. More than 75 per cent of the province’s 5 million residents live within 50 km of the coast.
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Pacific Salmon
Pacific salmon include 7 species of fish belonging to the genus Oncorhynchus, family Salmonidae.
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Pacific Western Airlines Ltd
In 1984, with the advent of the Economic Regulatory Reform (ERR), most of Canada experienced a deregulation program similar to that in the United States. The ERR had several significant effects. Two large trunk carriers, CAI and Air Canada, emerged, competing on major domestic routes.
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Pacifism
Pacifism is an outlook based upon religious or humanitarian belief that condemns war and social violence as inhuman and irrational, if not absolutely and always morally wrong, and therefore demands personal nonparticipation in war or violent revolution as well as a commitment to nonviolent methods of resolving conflicts.
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Padlock Act
The Padlock Act (Act Respecting Communistic Propaganda) was a 1937 Quebec statute empowering the attorney general to close, for one year, any building used for propagating "communism or bolshevism" (undefined).
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Paintbrush
The paintbrush is a herbaceous plant of genus Castilleja , figwort family, Scrophulariaceae. Most are perennial. The common name, Indian paintbrush, is applied to several species. About 200 species occur worldwide, mostly in
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Palaeontology
Palaeontology is the study of fossils, gives us knowledge of past life, helps us understand the nature of ancient organisms and provides information about the composition of the biomass of past times.
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Palliser Expedition
The explorers amassed astronomical, meteorological, geological and magnetic data, and described the country, its fauna and flora, its inhabitants and its "capabilities" for settlement and transportation.
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