Browse "Science & Technology"

Displaying 81-100 of 798 results
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Botany

The study of plant life is organized in 3 ways, which are also applicable to zoological material.

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Botany History

Long before formal study of plants began in Canadian academic institutions, they were studied by explorers and talented amateurs.

Macleans

Bottled Water Debate

On a remote hillside about 50 km northeast of Walkerton, Ont., springwater flows to the surface to form a clear pool. The area, surrounded by trees and about 1.5 km from the nearest farm, is fenced. Every month, Echo Springs Water Co. Ltd. employees pump about 4.

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Botulism

Human botulism can occur primarily as food-borne botulism, infant botulism or wound botulism.

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Bridge Disasters

​There have been several fatal bridge disasters over the course of Canada’s history, some during construction, others after the bridge was in use for some time.

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Bridges

More remarkable was the use of an ice bridge across the St Lawrence River in the winters of 1880-81 and 1881-82, from Hochelaga to Longueuil [Montréal], to carry a standard-gauge railway; from January to March in each of those winters a small train, weighing 60 tons, safely used this unique bridge.

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British Columbia Eocene Fossils

Palaeontological and geological studies of these deposits go back about 130 years. These include work carried out by George Mercer Dawson in 1890 as part of his survey of British Columbia for the Geological Survey of Canada, with occasional research published in the 1920s and 1930s.

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Brooks Aqueduct

The Brooks Aqueduct, located about 8 km southeast of Brooks, Alta, is considered by many to be one of the most significant engineering feats in Canada. It has been declared both a national and a provincial historic site.

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BSE-Infected Cow Found in Alberta

DANNY ROSEHILL remembers well the Tuesday morning in September when he watched the terrorist attacks on New York City while the weekly sale at his cattle auction house in Olds, Alta., continued apace. "The towers were brought down, 3,000 people killed, and yet the sale went on," says Rosehill.

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Buoy

Buoy, floating object, usually anchored but occasionally allowed to float freely or to be dragged by sea anchor. Buoys are widely used as navigation markers to indicate channels, the presence of shoals, etc.

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Burgess Shale

Burgess Shale is an area of layered rock featuring fossils from the middle of the Cambrian period (505–510 million years ago). In Canada, sites featuring Burgess Shale fossils are found in Yoho and Kootenay national parks. The name “Burgess” comes from Mount Burgess, a peak in Yoho National Park near where the original Burgess Shale site was discovered (the mountain is in turn named for Alexander Burgess, an early deputy minister of the Department of the Interior). Burgess Shale sites are the clearest record of Cambrian marine life because they contain rare fossils of soft-bodied organisms. The original Burgess Shale site is one of the reasons seven parks in the area were designated the Canadian Rocky Mountains UNESCO World Heritage site (the parks are Yoho, Jasper, Banff and Kootenay national parks, and Mount Robson, Mount Assiniboine and Hamber provincial parks).

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Bush Flying

 In Canada, the word "bush" has been used since the 19th century to describe the hostile environment beyond the clearings and settlements.

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Bye-boat

Bye-boat (by-boat), a name applied historically to any small inshore fishing craft, usually an open boat carrying 5-10 men, used in Newfoundland in the bye-boat fishery.

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Cadmium

Cadmium (Cd) is a soft, ductile, silvery white metal that melts at 320.9°C and is present in the earth's crust at 0.1-0.5 parts per million. The most common cadmium MINERAL, greenockite (CdS), is generally found in zinc-bearing ores and is recovered as a by-product during processing.