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Canada experienced an outbreak of severe acute respiratory syndrome (SARS) in 2003. Most of the infections originated in Toronto hospitals. The outbreak led to the quarantine of thousands, killed 44 people and took an economic toll on Toronto. It also exposed the country’s ill-prepared health-care system. Confusion around SARS fuelled an uptick in anti-Asian and anti-immigrant sentiment.

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The White Pass & Yukon Route railway was built to meet the demand for transportation to the gold fields of the Yukon River basin during the Klondike Gold Rush. Completed in 1900, it was a feat of engineering and one of the steepest railways in North America. It ran 177 km from Skagway, Alaska, to Whitehorse, Yukon. Today, tourist rail excursions run on a portion of the original line.

   Aviation, the art and science of flying, has been a practical reality since the early 20th century. Canadians have participated in its development almost from its inception.

To some extent, the history of engineering is the history of humanity's progress in using tools and observations on the nature of matter to overcome physical limitations and to modify, harness and control the natural environment.

With the beginning of sustained European settlement in what is now Canada, a new set of goals, values, demands and expectations was placed upon the land.

Military aviation began with the use of balloons for observation as early as 1794, during the French Revolution.

Canada helped develop the world’s first nuclear reactors and nuclear arms. During the Second World War, Canada participated in British research to create an atomic weapon. In 1943, the British nuclear weapons program merged with its American equivalent, the Manhattan Project. Canada’s main contribution was the Montreal Laboratory, which later became the Chalk River Laboratory. (See Nuclear Research Establishments). This Allied war effort produced the atomic bombs dropped on the Japanese cities of Hiroshima and Nagasaki in 1945. It also led to the development of Canada’s nuclear energy industry.

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Agriculture is the practice of growing crops and rearing animals mainly for food. Farmers also produce other items such as wool from sheep and CBD oil from hemp plants.

In Canada, agriculture is an important industry. Only about 7 per cent of Canada’s land can be farmed. Other marginal (poorer) land can be used to ranch cattle. Aquaculture operations are found on the East and West Coasts and in the Great Lakes. Some crops such as tomatoes, cannabis and flowers are grown in greenhouses in urban centres. Canadian agriculture faces many challenges. Some of these challenges concern crop protection, soil conservation, labour, climate change and health.

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Sasquatch is said to be a large, ape-like creature that lives primarily in the forests stretching from the West Coast of British Columbia to Northern California, and to a lesser extent throughout North America. Sasquatch is a cryptid — a creature whose existence is suggested, but has not yet been confirmed by the scientific community. Like the Yeti of Asia or the Abominable Snowman of the Himalayas, Sasquatch is rooted in Indigenous legend and is commonly researched by cryptozoologists and enthusiasts. Some believe Sasquatch is a nearly extinct species of hominid that survives in isolation, while others consider the creature to be the product of folklore and a hoax.

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.

In Canada the largest agency serving blind and visually impaired persons is The Canadian National Institute for the Blind. CNIB has 9 geographic service divisions with over 60 regional offices, and the CNIB Library for the Blind serves all areas of Canada.

Hydroelectricity is energy produced from flowing water. The amount of energy produced depends on volume and speed: the more water moving at a fast rate, the more energy produced. For this reason, many hydroelectric stations are built near waterfalls. To produce energy, water is directed toward turbines — sometimes with the help of a dam — causing them to spin. In turn, the turbines make electrical generators spin and electricity is produced. It is a renewable, comparatively nonpolluting energy source and Canada’s largest source of electric-power generation.

In 1874, Canadians Henry Woodward and Mathew Evans patented a design for an incandescent light bulb. Their invention preceded that of American Thomas Edison by several years. In fact, the second patent (issued in 1876 in the United States) was among those that Edison bought as he refined the technology to create a longer-lasting bulb. Woodward and Evans’s early work on the light bulb in Toronto has gone largely unrecognized. It was nevertheless an important development in the invention of electric lighting.

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Media convergence refers to the merging of previously distinct media technologies and platforms through digitization and computer networking. This is also known as technological convergence. Media convergence is also a business strategy whereby communications companies integrate their ownership of different media properties. This is also called media consolidation, media concentration or economic convergence. (See also Media Ownership.)

The solar system contains many objects smaller than the planets (or their satellites) travelling in individual orbits about the SUN; space between the planets also contains myriad dust grains in the micron size range. Near Earth, dust concentrations are only a few hundred particles per cubic kilometre, but 35 000 to 100 000 t of extraterrestrial material enters the atmosphere annually, swept up by our planet from debris that is in its path or crosses its path.

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 vaccines’ contents and 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.