Browse "Science & Technology"

Displaying 91-105 of 785 results

  • Article

    Breast Cancer Research in Canada

    Current breast cancer incidence and mortality rates are available through the Canadian Cancer Society, which annually updates these and other statistics.

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  • Article

    Bridge Disasters in Canada

    There have been several fatal bridge disasters over the course of Canada’s history, some during construction, others after a bridge was in use for some time. The following is a chronological account of the worst of these tragic events, including Canada’s most fatal bridge disaster, the 1907 collapse of the Quebec Bridge. (See also Highway Disasters; Railway Disasters.)

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  • Article

    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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  • Article

    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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  • Article

    British Columbia's Dinosaur Excavations

    Skeletal remains of dinosaurs are an exceedingly rare resource in British Columbia, so much so that prior to 2002, there were only two reports of single dinosaurian skeletal elements from this province. This changed in 2002 when the first reported concentration of dinosaur bones was discovered only a few kilometres from Tumbler Ridge in the Upper Cretaceous (Turonian) Kaskapau Formation. Paleontologists from the newly formed Peace Region Paleontology Research Centre (P.R.P.R.C.), based in Tumbler Ridge, began an excavation on this site in the summer of 2003, which continued to 2005. Over 200 isolated skeletal elements were found and removed, and the bones were from a number of dinosaurs (theropods, ankylosaurs & hadrosaurs) and other vertebrates (turtles, crocodiles, fishes and freshwater rays). Although this was the first dinosaur site from British Columbia and one of the oldest in western Canada (~97 million years old) the specimens were not articulated or complete.

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  • Article

    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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  • Macleans

    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.This article was originally published in Maclean's Magazine on June 2, 2003

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  • Article

    Building Codes and Regulations

    Under Canadian law the regulation of buildings is a provincial responsibility and is carried out through various laws, Acts, codes and regulations, often administered at the municipal level.

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  • Editorial

    Colonel By and the Construction of the Rideau Canal

    The following article is an editorial written by The Canadian Encyclopedia staff. Editorials are not usually updated. On September 29th of 1826 the governor of Canada, the Earl of Dalhousie, turned the first sod for construction of the lowest lock of the Rideau Canal. Later that day the participants gathered at Philemon Wright's tavern in Hull, where they indulged in a lavish dinner and the drinking of numerous toasts. One of the great engineering feats of its time was underway. 

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  • Article

    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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  • Article

    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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  • Article

    Bus Transportation

    The word "bus," short for omnibus, refers to any self-propelled road vehicle capable of carrying more persons than a private automobile.

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  • Article

    Bush Flying in Canada

    In Canada, bush flying refers to aviation in sparsely populated northern areas. Flight in the Arctic and the “bush” of the Canadian Shield developed between the world wars. Early bush pilots faced the challenges of cold weather and vast distances between communities. Given the rarity of airstrips, their planes were often equipped with skis or floats so that they could take off and land on water or snow. This type of aviation was key to developing services and industries in the North. While the romantic image of the bush pilot is associated with the past, bush flying continues to serve remote communities in Canada.

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  • Article

    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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  • Article

    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.

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