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The Redpath Museum is a natural history museum located on the grounds of McGill University, in Montreal, Quebec. Founded in 1882, it is the first purpose-built museum in Canada and one of the oldest continually operating museums in the country. The Redpath’s expansive collection is divided into four broad groups: mineralogy, palaeontology, zoology and world cultures (ethnology). (See also Minerals; Anthropology in Canada.) The collections are housed in a stand-alone museum building of Greek Revival style (see Architecture). In addition to its public education function, the Redpath is an integrated component of McGill University’s Faculty of Science, complete with research labs and undergraduate and graduate courses that make use of the museum’s ample collections.

The armed forces are the land, naval and air forces commanded by the federal government for the purpose of defending Canada's security, protecting its citizens, and promoting its strategic interests at home or abroad. The armed forces have evolved since colonial times from small, local militia units to the modern professional military forces of today.

Racial segregation is the separation of people, or groups of people, based on race in everyday life. Throughout Canada’s history, there have been many examples of Black people being segregated, excluded from, or denied equal access to opportunities and services such as education, employment, housing, transportation, immigration, health care and commercial establishments. The racial segregation of Black people in Canada was historically enforced through laws, court decisions and social norms.

See also Prejudice and Discrimination in Canada and Racism.

During the First World War, more than 5,000 Canadian pilots served in the Royal Flying Corps (RFC). The RFC was formed on 13 April 1912 to satisfy Britain's need for a military presence in the expanding field of aviation. It joined with the Royal Naval Air Service (RNAS) in April 1918 to become the Royal Air Force. During the war, an RFC/RAF training program in Canada produced approximately 10,500 pilots, mechanics and aircraftmen.

The Ram was a Canadian cruiser tank produced during the Second World War (WWII) to overcome the lack of tanks in Canada. This Canadian tank used a modified version of the US M3 tank chassis, with the addition of a turret that could accommodate a 40-mm anti-tank gun in the initial design and a 57-mm gun from 1942 on. From 1941 to 1943, the Montreal Locomotive Works produced about 1,949 Ram tanks. Because of the availability of other, more modern tanks, the Ram never saw combat, but its design served as the basis for variants such as the Kangaroo armoured personnel carrier and the Sexton self-propelled gun. The Ram and its variants are the only tanks ever designed and built in Canada. (See also Armaments.)

Moss is a small terrestrial plant, usually less than 10 cm tall, that lacks true conducting tissues (xylem, phloem) and has a dominant gametophyte (sexual) generation. Mosses are the largest and most highly developed group of division Bryophyta (which also includes liverworts and hornworts). Bryophytes are sometimes known as the “amphibians of the plant world” because of their dependence on water for sexual reproduction. There are over 10,000 species of moss worldwide, of which about 1,250 are found in North America. Individual parts of Canada have fewer species (e.g., 466 species in Alberta, 445 in Newfoundland, 430 in Ontario). Mosses thrive in humid climates, and coastal parts of Canada have a greater diversity than the interior parts.

When the First World War began in August 1914, the Royal Canadian Navy (RCN) was unprepared to fight a war at sea. Founded only in 1910, it consisted of two obsolete cruisers, HMCS Niobe and HMCS Rainbow, and about 350 regular sailors, augmented by 250 reservists. During the war, it was assigned a growing number of tasks, which it was ill-equipped to perform. This included protecting Canadian coastal waters against German U-boats. The RCN scrambled to find ships and sailors but was ill-equipped to fight enemy submarines, which sank several vessels in Canadian waters in 1918.

Since its inception in 1924, the Royal Canadian Air Force (RCAF) has served Canadians in peace and war. It played a vital role in the Second World War, becoming the fourth-largest Allied air force, and reached its "golden age" in the late 1950s, with dozens of combat squadrons on the front lines of the Cold War. The term Royal, dropped from the name in 1968, was returned to the air force in 2011.

During the Cold War, the Canadian Navy played a crucial role in antisubmarine warfare (ASW), working closely with its allies to patrol and monitor the North Atlantic and Pacific Oceans for Soviet submarine activity. Canada invested in new technology and continually modernized its fleet of ships and aircraft to better detect and counter Soviet submarines. It also operated strategic warning systems with its allies, particularly the United States. By the end of the Cold War, Canada had developed a very high reputation in the field.

Surveys suggest that there may be as many as 2 million lakes in Canada. While some look like small scratches on the country’s surface, many are quite large — Canada possesses nearly 14 per cent of the world’s lakes with surface areas over 500 km². Below is a list of the largest of these large lakes. The list is ordered by the lake’s total surface area, not just the portions within Canadian borders.

Jim Keegstra was a secondary school teacher in rural Alberta who taught anti-Semitic propaganda to his students. He was charged with a hate crime in 1984 and was found guilty in 1985. However, Keegstra launched repeated appeals arguing that the Criminal Code violated his constitutionally guaranteed freedom of expression. The landmark case (R. v. Keegstra) tested the balance between the right to freedom of speech outlined in the Canadian Charter of Rights and Freedoms and the law’s limits on hate speech stipulated in the Criminal Code. The case came before the Supreme Court of Canada in 1990 and 1996. The Court ultimately ruled against Keegstra by deciding that Canada’s hate laws imposed a “reasonable limit” on a person’s freedom of expression.

Lucy Maud Montgomery’s first novel, Anne of Green Gables (1908), became an instant bestseller and has remained in print for more than a century, making the character of Anne Shirley a mythic icon of Canadian culture. The book has sold an estimated 50 million copies worldwide, been translated into at least 36 languages, as well as braille, and been adapted more than two dozen times in various mediums. A musical version first produced by the Charlottetown Festival in 1965 is the longest running annual musical theatre production in the world, while the award-winning 1985 CBC miniseries starring Megan Follows is the most-watched television program in Canadian history. Thousands of tourists visit Prince Edward Island each year to see the “sacred sites” related to the book, and the sale of Anne-related commodities such as souvenirs and dolls has come to constitute a cottage industry.

Airplanes became an important part of modern warfare during the First World War (1914–18). Aircraft technology developed rapidly and by war’s end, airplanes were involved in reconnaissance, artillery spotting, air-to-air combat, strafing ground targets, anti-submarine warfare, tactical and strategic bombing and home defence. More than 20,000 Canadians served in British flying services (Royal Flying Corps, Royal Naval Air Service and Royal Air Force) during the war. Approximately 1,400 were killed or died from wounds or accidents. Canada did not have an air force during the First World War; a single-plane Canadian Aviation Corps was established in 1914, but never saw service and soon disbanded. Later, on 5 August 1918, two Canadian Air Force squadrons were formed in Britain, but were disbanded the next year when the British cut off funding. The Royal Canadian Naval Air Service was formed in September 1918 but lasted only three months before the war ended. Canada would not have a permanent air force until 1924 (see Royal Canadian Air Force).

The Truth and Reconciliation Commission of Canada (TRC) was officially launched in 2008 as part of the Indian Residential Schools Settlement Agreement (IRSSA). Intended to be a process that would guide Canadians through the difficult discovery of the facts behind the residential school system, the TRC was also meant to lay the foundation for lasting reconciliation across Canada.

This is the full-length entry about the Truth and Reconciliation Commission. For a plain language summary, please see Truth and Reconciliation Commission (Plain Language Summary).

The Green Party of Canada is a federal political party that advocates environmentalism as the key to a sustainable society. Annamie Paul was elected in 2020 to become the party’s leader, replacing Elizabeth May. Paul became the first Black Canadian and the first Jewish Canadian woman to permanently lead a federal political party. She resigned as leader after the party’s poor performance in the September 2021 federal election.

Two Green Party candidates were elected to the House of Commons in the 2021 election. (See Member of Parliament.)

The Nobel Prizes are awarded annually for achievements that have significantly benefitted humankind. The prizes are among the highest international honours and are awarded in six categories: physics, chemistry, physiology or medicine, literature, peace, and economics. They are administered by the Nobel Foundation and awarded by institutions in Sweden and Norway. Eighteen Canadians have won Nobel Prizes, excluding Canadian-born individuals who gave up their citizenship and members of organizations that have won the peace prize.

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.

Click here for definitions of key terms used in this article.

The Great Depression took place in Canada and around the world in the 1930s. The term “Depression” is used to describe an economic decline that lasts for a long time. During the worst period of the Depression about 30 percent of Canadians were unemployed. This made life very difficult because Canada had few social programs at the time. This changed because of the Depression. In the 1930s the government created social programs to help those in need. It also became more involved in the economy.

(This article is a plain-language summary of the Great Depression in Canada. If you are interested in reading about this topic in more depth, please see our full-length entry, Great Depression in Canada.)

Overdoses from a class of painkiller drugs called opioids are claiming the lives of thousands of Canadians from all walks of life. The death count is the result of an escalating public health crisis: an epidemic of opioid addiction. The crisis is made deadlier by an influx of illicit fentanyl and chemically similar drugs, but it can be traced to the medical over-prescribing of opioids, including oxycodone, fentanyl and morphine.