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Macleans

Cloning Sheep

For more than a decade, scientists have been using genetic technology to produce biologically identical copies, or clones, of animals. In theory, cloning can be used to improve sheep and cattle breeds by ensuring that the animals' most desirable genetic characteristics are passed on.

Macleans

StatsCan Reports on Women

Women now make up slightly more than half of all people living in Canada. In fact, in 1991, the last census year, 50.4 per cent of the total population was female, compared with 50.2 per cent in 1981 and 48.4 per cent in 1921.

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Gardiner Dam

Gardiner Dam, located 100 km south of Saskatoon, is a 5 km long earth-fill structure towering 64 m above the South Saskatchewan riverbed.

Macleans

Ontario Implements Tax Break

It was perhaps ironic that Ontario's controversial Conservative government could not even cut taxes without sparking an agonized debate. Eleven months after Premier Mike Harris swept to power, he fulfilled a key election promise in last week's budget, introducing the first stages of a 30.

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Genetic Diseases

Genetic diseases result from chromosome abnormalities or mutant genes showing a specific pattern of inheritance. In addition, genetic factors are involved in susceptibility to some nongenetic DISEASES.

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German Furniture

Furniture of Germanic derivation has come to Canada as a result of emigration from Germany and from Pennsylvania (see GERMANS). Traditional German furniture in Europe evolved over several centuries to serve the needs of ordinary, primarily rural, people.

Macleans

Male and Female Brains

It began almost by accident. In an effort to uncover the causes of dyslexia, psychologist Sandra Witelson decided in 1970 to conduct an experiment involving dyslexic and other children at a Hamilton grade school. Because dyslexia affects mostly males, Witelson planned to use boys only.

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Fossil

  Fossil [Lat fossilis, "dug up"], trace of an ancient animal or plant preserved in the Earth's crust. Palaeontology is the modern, scientific study of fossils, but these curious objects have attracted attention since ancient times.

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.

Macleans

Life on Mars?

It was an evening in summer upon the placid and temperate planet Mars. Up and down green wine canals, boats as delicate as bronze flowers drifted ....

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Ocean Ranger

On 15 February 1982, the world's largest semisubmersible drill rig, Ocean Ranger, capsized and sank in a fierce storm on the Grand Banks with the loss of all 84 crew members, 56 of whom were Newfoundlanders.

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Glaciation

Glaciation is the formation, movement and recession of glaciers. Glaciation was much more extensive in the past, when much of the world was covered in large, continental ice sheets. Currently, glaciers cover about 10 per cent of the world's land area (14.9 million km2).

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Gravity

Gravity, the fundamental physical property of attraction between all bodies, is here considered mainly as it relates to the study of the Earth.

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Geology

Earth is 70.8% covered by water, but only with the development of sonar techniques has it become possible to describe the solid earth below the oceans. With increasingly sophisticated satellite observations, relatively fine structural details (eg, areas of volcanic activity) can be seen.

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Fuel Cell

The fuel cell, device that directly converts the energy potential of fuels into electrical power. (Electrical power is equivalent to work output.) Directly means without first burning the fuel to cause a temperature rise followed by a second-step, which is the conversion of heat into work.

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Galaxy

Serious attempts to estimate the size of the galaxy began in the 19th century.

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Farm Radio Forum

Farm Radio Forum, 1941-65, was a national rural listening-discussion group project sponsored by the Canadian Association for Adult Education, the Canadian Federation of Agriculture and CBC.

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Farm Silo

Farm silos are storage structures for silages and high-moisture grains used for livestock feeds. Silos are a common fixture in livestock and mixed-farming operations across Canada.