The World Assembly on Aging has confirmed the need to address issues pertinent to older workers in industry and agriculture.

Around 1920 American drama was recognized as a major literary form, largely due to the influence of the playwright Eugene O'Neil.

Erosion is a general term for the processes by which the top layer of soil is constantly being worn away.

The history of the exploration of Antarctica recounts many tales of perseverance and suffering.

Modern nursing practices not only hasten the recovery of the sick, but also promote better health through preventive medicine.

Solitary most of the year, foxes do not live in dens except during the breeding season.

Ships passing on the high seas exchange salutes by lowering and raising their flags once.

The Gettysburg Address, Abraham Lincoln's famous speech, concisely expressed many of the ideals and principles of democracy.

The prehistoric art of inscribing figures and designs on rock surfaces seems to have slowly disappeared with the advent of agriculture, which required a large amount of time and energy.

According to the American Red Cross, blood and plasma donors are urgently needed after natural disasters or other catastrophes.

Diamonds that are flawed or are too small for jewelry are used to cut very hard metals.

At the zenith of her career in the 1930's, Dorothy Thompson was one of the best known journalists in the United States.

In order to understand the concept of infinity, we must think in much broader terms than we are accustomed to.

The policy of separation of church and state has limited direct government support of private schools in the United States.

A seismograph is a device designed to measure vibrations of the ground.

Before the advent of synthetic fibers, people had to rely entirely on natural productions for making fabrics.

To have an autistic child in her class was certainly not easy; however, the teacher realized that his parents had an even more arduous task to take care of him.

Ants follow scent trails so precisely that they can locate their nests without hesitation.

As a result of his pioneering work with Louis Armstrong in the late 1920's, Earl Hines has been called the father of modern jazz piano.

The significance of magazines among contemporary media is sometimes grossly underestimated because of television's seeming dominance.

Whether the giant panda belonged to the bear or raccoon families was a matter of zoological contention for years.

Bats, the only mammals capable of true flight, can spot small insects with ease.

The carp is actively cultivated for human consumption even though it often destroys the eggs of more valuable fish.

George Washington was reluctant at first to serve as President of the United States.

Although "generation gap" is a relatively recent term, discord between parents and children is hardly a new phenomenon.

Garlic is a plant grown for its pungently flavored bulb, which is used to season foods.

With the latest technological advances, robots can be equipped with devices that stimulate the rudimentary functions associated with sight and touch.

Developed in 1895, the x-ray tube revealed the structure of matter on the atomic scale.

For children, playing is an automatic and integral component of growing up.

Important features of dehydrated foods are their lightness in weight and their compactness.

Attempts to transfuse human blood were first reported in the seventeenth century.

Niagara Falls is a a great tourist attraction, luring millions of visitors each year.

For many adolescents, participation in sports is one way that they can feel true self-esteem.

Most traditional folk songs are of anonymous origin.

South Carolina's mineral resources are abundant, but not all of them can be lucratively mined.

Through the method of echo sounding, oceanographers can ascertain the depth of the ocean at a specific site in a matter of seconds.

The disappearance of lichens from an area gives warning of an endangered environment.

Library patrons can either hunt through the card files or go to the librarian if they have inquiries related to book listings.

It has taken many years to adopt internationally recognized standards for the licensing of aircraft pilots.

Spearmint oil is distilled for flavoring chewing gum and candy and used as a disguise for disagreeable tastes in medicines.

In the Gothic novel, emphasis is placed on setting and plot, rather than on character development.

Ravaged by pollution and war, many famous monuments have become eroded and stained.

Pendulums are used to regulate motion in some scientific equipment.

Louis Sullivan, a famous American architect, varied his structures to suit the local climate.

Although barbers now restrict their services to cutting and styling hair, their predecessors used to extract teeth as well.

Plants without leaves, such as algae and fungi, are the first forms of life to grow back after a natural catastrophe.

Most religions are concerned with the worship of one or several deities as well as with ethical rules of conduct.

Major earthquakes are among nature's most devastating events, causing an incalculable loss of life and property.

When required by their parents to eat spinach and other green vegetables, many children only do so reluctantly.