Browse "Science & Technology"

Displaying 706-720 of 781 results

  • Article

    Tide

    The Earth is actually not in orbit around the sun but around the centre of mass of the Earth-sun system. Since all parts of the Earth move in the same orbit, they experience the same acceleration, but only at the Earth's centre is this acceleration exactly balanced by the sun's gravitation.

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  • Article

    Time

    Precise timekeeping helped establish and develop Canada. For the past 2 centuries, Canadian exploration, mapping, navigation and transportation have exploited state-of-the-art precise time systems. 

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  • Article

    Time Dissemination

    Accurate TIME is disseminated or distributed by telecommunication systems to end users across Canada. Time and frequency references, traceable within stated limits to recognized standards, are available in Canada by ground and satellite based radio, television and telephone.

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  • Article

    Tipi

    Tipis are cone-shaped dwellings that many Plains Indigenous peoples used to live in until the mid-1800s. Today, tipis retain cultural significance and are sometimes constructed for special functions. (See also Architectural History of Indigenous Peoples in Canada.)

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  • Article

    Titanium

    Titanium (Ti) is a metallic element estimated to form about 0.5% of the rocks of the Canadian SHIELD. Titanium minerals of commercial importance include the dioxides rutile and anatase, which are polymorphs of TiO2 and ilmenite (FeO.TiO2), a mineral that contains 52.7% TiO2.

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  • Article

    Tomahawk

    Tomahawk is a name commonly given to axes used by Indigenous peoples.

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  • Article

    Tommy Douglas and Eugenics

    Tommy Douglas — the father of socialized medicine in Canada and one of the country’s most beloved figures — once supported eugenic policies. In 1933, he received a Master of Arts in sociology from McMaster University for his thesis, “The Problems of the Subnormal Family.” In the thesis, Douglas recommended several eugenic policies, including the sterilization of “mental defectives and those incurably diseased.” His ideas were not unique, as two Canadian provinces (and 32 American states) passed sexual-sterilization legislation in the 1920s and 1930s. However, by the time Douglas became premier of Saskatchewan in 1944, he had abandoned his support for eugenic policies. When Douglas received two reports that recommended legalizing sexual sterilization in the province, he rejected the idea.

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  • Article

    Tonquin

    The Tonquin was a ship of 269 tons built in New York in 1807 and purchased 23 August 1810 by New York fur merchant and entrepreneur John Jacob Astor.

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  • Macleans

    Toronto a SARS Hotspot

    This article was originally published in Maclean’s magazine on April 14, 2003. Partner content is not updated.

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  • Article

    Toronto Feature: Centre for Addiction and Mental Health

    This article is from our Toronto Feature series. Features from past programs are not updated.

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  • Article

    Toronto Feature: Discovery of Insulin

    This article is from our Toronto Feature series. Features from past programs are not updated.

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  • Article

    Toronto Subway

    The Toronto subway is part of a larger public transportation network, including streetcars, buses and light rapid transit, run by the Toronto Transit Commission (TTC). It opened on 30 March 1954, making it Canada’s first subway. Since then, it has grown from a single, 12-station line running 7.4 km beneath Yonge Street to a three-line system encompassing 70 stations running 70.1 km. In 2024, the TTC recorded 181 million passenger trips on the Toronto subway.

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  • Article

    Trans-Canada Airlines

     Trans-Canada Airlines was created 10 April 1937 by Act of Parliament as a subsidiary of CANADIAN NATIONAL RAILWAYS to provide air service to all regions of Canada. TCA began with 2 passenger aircraft and a small bi-plane, which was used to survey new routes.

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  • Article

    Trans-Canada Highway

    The Trans-Canada Highway is a continuous road that allows vehicle travel across Canada. The highway runs through each of Canada’s 10 provinces, from Victoria, British Columbia, to St. John’s, Newfoundland and Labrador. At 7,821 km, it is the fourth-longest highway — and second-longest national highway — in the world.

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  • Article

    Trans Mountain Pipeline Expansion Project

    The Trans Mountain Expansion is a project to build about 980 km of new pipe, most of which will run parallel to the existing Trans Mountain oil pipeline. The new line will carry diluted bitumen, or “dilbit,” from Edmonton, Alberta to Burnaby, British Columbia. The expansion will increase the pipeline route’s overall capacity from 300,000 barrels per day to 890,000 barrels per day. The project’s first owner, Kinder Morgan Canada, sold it to the Government of Canada in 2018. The Trans Mountain Expansion has been a focus of environmental and economic debates, as well as political conflicts. The $12.6 billion project is now under construction.

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