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Linguistics is the study of language. Language accompanies almost all human activities, and is the medium for many of them.

Lead is extracted from mined ores containing zinc, silver and minor amounts of copper. It is also recovered from recycled materials; more than 50% of world metal production comes from recycling, making lead one of the most recycled metals in the world.

Ecology is subdivided into 3 fields of study: autecology (relations of individual species or populations to their milieu), synecology (composition of living communities) and dynecology (processes of change in related communities).

 McKee Trophy, award given annually for contribution to the advancement of Canadian aviation. It was donated by J. Dalzell McKee, an American sportsman pilot, who completed the first flight of a seaplane across Canada in 1926.

Medical jurisprudence, broadly defined, covers the relationship between a patient and a health-care provider such as a doctor, nurse, dentist, physiotherapist, or even an institution such as a HOSPITAL.

The Metropolitan-Hinterland Thesis is a theory of historic relations between a large, powerful urban community (metropolis) and the surrounding territory (hinterland) which the metropolis dominates through mainly economic means. Formulated by economic historian N.S.B.

Early settlers in Ontario experienced a disease called "fever and ague," which ravaged the first European settlements such as Newark [Niagara-on-the-Lake] and Cataraqui [Kingston].

The term medicine wheel is not an Aboriginal term, but was initially used around the turn of the century by Americans of European ancestry in reference to the Bighorn Medicine Wheel located near Sheridan, Wyoming. Later archaeological research on the Plains Aboriginal people identified other features characterized by a variety of stone circle, cairn and spoke configurations. Because of general similarities to the Bighorn Wheel, the term medicine wheel was extended to describe them as well.

The involvement of a society in mathematics is determined by cultural and functional factors.

Mary Celeste was a brigantine built in 1861 at Spencer's Island, Nova Scotia, and originally named Amazon. She was wrecked off Cape Breton in 1867, salvaged, sold and in 1868 registered at New York and renamed Mary Celeste. In 1872 she was found adrift off the Azores, with no sign of her crew.

Metamorphic rock is one of the 3 major classes of rock comprising the Earth's crust, the others being SEDIMENTARY and IGNEOUS ROCKS. Metamorphic rock has been transformed, while in the solid state, by pressure, temperature and deformation.

Canada’s lumber and wood industries convert logs into various products, from lumber to wood chips.

General practice is the branch of medicine concerned with providing care (known as "primary and continuing care") to patients irrespective of their age, sex or type of problem.

Although medicines have been misused for as long as they have been available, a universally accepted definition of the term "drug abuse" does not exist.

The years since 1939 have seen great changes in Canadian medicine.

Like most industrial activities, mining involves risk. However, contemporary mining in Canada is much safer than it once was.

Mechanical Engineering is a branch of ENGINEERING that deals with the design, construction and operation of machines.

In 1963 the first detection of a molecule (the hydroxyl radical OH) at centimetre-wavelength radio frequencies was made by Weinreb, Barrett, Meeks and Henry of the Massachusetts Institute of Technology.

Mathematics is the science of numbers and spatial relationships.

In 1970, the Canadian government introduced guidelines for the development of a pipeline corridor south from the Mackenzie River delta to Alberta and the United States. Energy companies have since proposed three separate projects to transport natural gas by pipeline along this route — the Arctic Gas Pipeline, the Foothills Pipeline and the Mackenzie Gas Project — with an oil pipeline likely to follow in the first two cases. However, due to high costs, engineering challenges, environmental concerns, Indigenous land claims and changing markets, none of these pipelines has been built.