Science & Technology | The Canadian Encyclopedia

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  • Article

    Disability

    Disability is defined by the World Health Organization (WHO) as the temporary, prolonged or permanent reduction or absence of the ability to perform certain commonplace activities or roles, sometimes referred to as activities of daily living.

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  • Article

    Disease

    In recent years genetic diseases have become better understood since they are dependent on a fault in the normal gene sequence that controls body activities.

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  • Macleans

    Distinctive Brains of Psychopaths

    This article was originally published in Maclean’s magazine on January 22, 1996. Partner content is not updated. In British author Philip Kerr's futuristic novel, A Philosophical Investigation, scientists can determine whether a man is prone to violent criminal behavior by administering a brain scan to detect an abnormality.

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  • Macleans

    Doctor Averts Euthanasia Trial

    This article was originally published in Maclean’s magazine on March 9, 1998. Partner content is not updated. For someone facing the prospect of being sent to trial on a charge of murder, Nancy Morrison appeared remarkably calm. As she stood to one side of a packed courtroom in Halifax last Friday morning, the 42-year-old respirologist spoke amiably with one of her defence lawyers.

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  • Macleans

    Doctor Charged in Patient's Death

    This article was originally published in Maclean’s magazine on May 19, 1997. Partner content is not updated. Late last September, Paul Mills’s family was deeply distressed over his battle with throat cancer in a Moncton, N.B., hospital. In the hope that more advanced treatment might help, they transferred him to the Queen Elizabeth II Health Sciences Centre in Halifax.

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  • Article

    Dorion School Bus–Train Crash

    A collision between a school bus and a freight train on 7 October 1966 killed 19 students from Cité-des-Jeunes secondary school near Vaudreuil, Quebec, and their bus driver. The crash is among the worst road disasters in Canadian history.

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  • Article

    Dorothea Palmer

    Dorothea Ferguson (née Palmer), birth control advocate, social worker (born 1908 in England; died 5 November 1992 in Ottawa, ON). Dorothea Palmer was arrested in 1936 for advertising birth control to women in a working-class neighbourhood in Ottawa. She was cleared of charges after a lengthy trial proved her work had been for the public good. Her acquittal was a major victory for the birth control movement in Canada.

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  • Macleans

    Drug Therapy for Strokes

    This article was originally published in Maclean's Magazine on March 20, 2000. Partner content is not updated.One Saturday morning last November, Peggy Code collapsed outside a suburban Calgary mall. Helped to a nearby bench, the 64-year-old nurse realized she was drooling and that the entire left side of her body was insensate.

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  • Macleans

    Drug Trials Controversy

    This article was originally published in Maclean’s magazine on December 21, 1998. Partner content is not updated.By enduring frequent blood transfusions and painful injections that allow a drug to be pumped into her body at night, 14-year-old Julie Vizza has survived a rare blood disease called thalassemia that leaves her body dangerously short of oxygen.This article was originally published in Maclean's Magazine on December 21, 1998

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  • Article

    Dugout Canoe

    A dugout canoe was a common type of canoe, traditionally used by ​Indigenous peoples and early settlers wherever the size of tree growth made construction possible. The dugout canoe was most popular along the West Coast, where waters teeming with sea life—whales, seals,  sea lions, salmon,  halibut, herring, eulachon and shellfish—sustained a complex maritime culture. (See also Northwest Coast Indigenous Peoples in Canada.) 

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  • Article

    Early French Measurement

    Early French Measurement French Unit English Equivalent Metric Equivalent pied 1.066 feet .325 m toise (6 pieds) 6.40 feet 1.95 m perche (3 toises) 19.18 feet 5.85 m arpent (10 perches) 191.8 feet 58.5 m lieue (84 arpents) 3.05 miles 4.91 km For more information see the article weights & measures. 

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  • Article

    Early-Warning Radar

    Air-defence radar stations were first established in Canada along the Atlantic and Pacific coasts in 1942, but were dismantled following the defeat of Germany and Japan in 1945.

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  • Article

    Eastman Bus Crash

    Canada’s second deadliest road disaster was a single-vehicle bus crash that killed 40 people near Eastman, Quebec on 4 August 1978.

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  • Article

    Eating Disorders

    Eating disorders are diseases in which people have unhealthy relationships with food caused by poor self-image, a fear of weight gain or an inability to stop eating. Such disorders are often coping mechanisms for other personal or psychological problems.

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  • Macleans

    Eating Right

    This article was originally published in Maclean’s magazine on October 27, 1997. Partner content is not updated.

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