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Geothermal Energy is the exploitable heat within the Earth. The interior of the planet is maintained at a high temperature by a vast store of heat, of which part remains from the formation of the Earth and part is continually generated by the decay of radioactive elements

Drumlin, smooth, half egg-shaped or ellipsoidal hill which formed beneath Quaternary GLACIERS. Drumlins [Gaelic druim, "hill"] were first described in Ireland. They lie parallel to the direction of ice movement, the blunt (stoss) end facing up-glacier, the lee sloping down-glacier.

 Concern over declining waterfowl populations in the early decades of the 20th century reached a crisis during the Prairie drought of the 1930s.

Dragonfly, common name for robust carnivorous insects of order Odonata [Gk "toothed," referring to mouth parts].

Early in the morning of 4 Feb 1880, a party of armed men brutally murdered James Donnelly, a farmer living near the village of LUCAN, Ont, his wife Johannah, his sons Thomas and John, and his niece Bridget Donnelly.

Dower refers to a form of marital property right. In its ancient form dower entitled a widow to a life interest in a portion of the lands owned by her deceased husband. Widowers were accorded similar rights, known as "curtesy.

Cape Race, elevation 30-40 m, is the southeastern extremity of Newfoundland's AVALON PENINSULA. Named for its flat-topped (Portuguese, raso) cliffs, it has a barren appearance that creates a stark impression for transatlantic

​An earthquake is a vibratory motion generated from the movement of rock along a fault line beneath the Earth’s surface.

Echinodermata [Gk "spiny skin"], phylum of exclusively marine invertebrate animals. The 6000 known species occur from shores to greatest depths of all oceans.

The dominant activity of the electrical appliance industry in Canada is the design, manufacture and sale of major household appliances. The core products (ie, those with very high saturation levels, approaching the category of necessities) are refrigerators, ranges, automatic washers and dryers.

Human botulism can occur primarily as food-borne botulism, infant botulism or wound botulism.

Dove is the name applied to certain species of the pigeon family, especially to those of smaller size.

Fascism is a term often loosely used to describe military dictatorships and extreme right-wing governments and organizations (or individuals) known to be either violently anticommunist or violently anti-Semitic, or both.

Film distribution is one of the three main branches of the film industry. It provides the link between film production and exhibition. It is also the most profitable of the three sectors and is dominated by large multinational conglomerates. Film distribution companies supply movies, television programs, videos and new media to outlets such as cinemas and broadcasters. They do so in territories where they have acquired rights from the producers. Traditionally, distribution companies are the prime source for financing new productions. The distribution sector has been called “the invisible art.” Its practices tend to only concern industry insiders and go unnoticed by audiences. American companies dominate film distribution in Canada. They have controlled access to Canadian screens since the 1920s. (See also: Canadian Film History: 1896 to 1938.)

Canada Savings Bonds differ from other government bonds in that they can be cashed at any bank for the face value plus accrued interest. They cannot be sold by the original buyer but must be held until cashed or until they mature (usually in 7 years) from the time they were bought.

Many of the concerns of modern government cut across the loose jurisdictional boundaries found in the constitution. National purposes can often only be achieved with provincial co-operation; provincial goals often require federal assistance.

Exploration of Canada by Europeans began with the Norse in the late 10th century on the country’s East Coast. Following Jacques Cartier’s arrival in 1534, over the course of the next three centuries British and French explorers gradually moved further west. Commercial, resource-based interests often drove exploration; for example, a westward route to Asia and later, the fur trade. By the mid-19th century most of the main geographical features of Canada had been mapped by European colonists. (See also Arctic Exploration.)

Modern understanding of evolution began in 1859 with publication of Charles Darwin's On the Origin of Species by Means of Natural Selection.

An esker is a ridge (Gaelic eiscir, "ridge") of gravel and sand emplaced during glacial melt by the deposition of sediments from meltwater rivers flowing on the ice (channel fills) or beneath a glacier (tunnel fills).