Browse "Science & Technology"

Displaying 736-750 of 785 results

  • Article

    Tuberculosis

    Tuberculosis (TB) has been known and dreaded since Hippocratic times (460-377 BCE). It was once known as "consumption" and claimed the lives of such famous people as the Brontë sisters, Robert Louis Stevenson and Vivian Leigh.

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  • Article

    Tumpline

    A tumpline is a strap that crosses the head (sometimes the chest) and is used for carrying a pack. In Canada, Indigenous peoples and early settlers used this load-bearing device to carry goods over long distances. Tumplines are still used all over the world, from people in rural communities to modern outdoor outfitters.

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  • Article

    Tungsten

    Tungsten (W), also called Wolfram, lapis ponderosus or Heavy Stone, is a silver-grey metallic element with the highest melting point of any metal (3410° C). Tungsten has a high density, high strength at elevated temperatures and extreme hardness.

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  • Article

    Tunnels

    Unlike other mountainous countries such as Switzerland, and despite its size, Canada is not distinguished by well-known tunnels.

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  • Editorial

    John Tuzo Wilson's Theory of Plate Tectonics

    The following article is an editorial written by The Canadian Encyclopedia staff. Editorials are not usually updated.

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    https://thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9 John Tuzo Wilson's Theory of Plate Tectonics

  • Article

    UFOs in Canada

    For 45 years, the Canadian government investigated unidentified flying objects (UFOs). Several of its departments and agencies collected sighting reports of UFOs in Canadian airspace from 1950 to 1995. These investigations started during the Cold War, spurred by fears of Soviet incursions. What began as a military question eventually became a scientific one. From the start, however, the government was reluctant to study this topic. It devoted few resources to it, believing UFOs to be natural phenomena or the products of “delusional” minds. By contrast, many Canadian citizens were eager for information about UFOs. Citizens started their own investigations and petitioned the government for action. In 1995, due to budget cuts, the government stopped collecting reports altogether. For their part, citizen enthusiasts have continued to investigate UFOs.

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  • Article

    Umiak

    Until recent times, the umiak — which means “open skin boat” in Inuktitut — was the primary method of summer transport for coastal Inuit , used for moving family and possessions to seasonal hunting areas and for whaling expeditions.

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  • Macleans

    UN Designates 2005 International Year of Physics

    EXACTLY 50 YEARS after his death - 100 since he stunned the world with science's most famous equation, E=mc2 - time is once again dancing to the imagination of Albert Einstein.This article was originally published in Maclean's Magazine on April 18, 2005

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    https://thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9 UN Designates 2005 International Year of Physics

  • Article

    Uranium

    Uranium oxide was first identified in 1789 by M.H. Klaproth in the MINERAL pitchblende, but its distinctive property of radioactivity was discovered much later (1896) by Henri Becquerel.

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  • Article

    Urban and Regional Planning

    In broadest terms, urban and regional planning is the process by which communities attempt to control and/or design change and development in their physical environments.

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  • Article

    Urban Effect on Climate

    The urban effect on climate is one of the best examples of unintentional human modification of the atmosphere (see Climatology). The construction of every building, road, and parking lot creates a new local microclimate. Taken together with air pollution from human activities, these changes constitute the local effect of a settlement upon its climate. In Canada, such effects have been observed in villages with as few as 1,000 inhabitants, in metropolitan areas, and across all climatic regions. 

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  • Macleans

    V-chip Promise

    When Maxine Lawson first suspected that her two-year-old son, Caden, might be picking up nasty habits from television, she was not sure what to do about it. "If he caught a glimpse of something like wrestling, he'd start kicking and pushing," the Toronto accountant recalls.This article was originally published in Maclean's Magazine on March 25, 1996

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  • Macleans

    V-chip Technology

    Tim Collings is one of those techies who uses the word "neat" as often as some Canadians use "eh." A soft-spoken engineering instructor at Simon Fraser University in Burnaby, B.C., the 34-year-old Collings clearly gets excited by gadgetry.This article was originally published in Maclean's Magazine on June 17, 1996

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  • Article

    Vaccination and Vaccine Hesitancy in Canada

    Vaccination is the introduction of a vaccine into the body to produce immunity to a disease. Vaccine hesitancy is the refusal or delayed acceptance of vaccination due to fears or anxiety about vaccines. It includes a range of concerns such as uncertainty about the contents of vaccines, their safety and the belief that vaccines are responsible for causing other medical conditions (e.g., autism). Other factors include opposition to state control and infringement on individual liberty, suspicions about the pharmaceutical industry and a declining faith in science and medicine. In Canada, as in other wealthy countries, vaccine hesitancy has increased in recent years, including resistance to vaccination among some Canadians during the COVID-19 pandemic. This is the full-length entry about Vaccination and Vaccine Hesitancy in Canada. For a plain-language summary, please see Vaccination and Vaccine Hesitancy in Canada (Plain-Language Summary). 

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  • Article

    Vaccination and Vaccine Hesitancy in Canada (Plain-Language Summary)

    A vaccine is put into the body (usually through injection) to make people immune from a disease. Another word for immune is “protect.” Vaccine hesitancy occurs when people will not take a vaccine, or they wait to take a vaccine. Vaccines prevent millions of deaths each year. But many individuals still do not want to take vaccines. As a consequence, some diseases have reappeared. And it can stop herd immunity. Herd immunity happens when most people are immune from a disease. Herd immunity stops the spread of disease. The World Health Organization says that vaccine hesitancy is a serious threat. In fact, it stated that it is one of the “Top Ten Threats to Global Health.” This article is a plain-language summary of Vaccination and Vaccine Hesitancy in Canada. If you are interested in reading about this topic in more depth, please see our full-length entry, Vaccination and Vaccine Hesitance in Canada. 

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    https://d3d0lqu00lnqvz.cloudfront.net/media/new_article_images/PolioVaccine/Acc1260.jpg Vaccination and Vaccine Hesitancy in Canada (Plain-Language Summary)