John Chapman became famous in America folklore as "Johnny Applessed" after he plants apple trees throughout the northeastern part of the United States.

Bats avoid running into objects by ... high-frequency sounds and listening for echoes.

Because of his reservations about the issue, ... refused to vote for it.

It has been estimated that if we intend to stay above the starvation level, ... the food supply.

When a country in an early stage of development, investments in fixed capital are vital.

... in the United States declined from twenty million in 1910 to nine million in the 1970's.

Inasmuch he kept mostly to himself, the author of The Treasure of the Sierra Madre was known as the mysterious B. Treuen

To determine an object's force, the mass and speed of the object must be measure.

Automakers Nissa and Ford and several aerospace research facilities in Great Britain are working lately to apply active noise cancellation to entire cars and planes.

Almost in simple form have been known from the invention of writing.

The general sales tax has been a major source of income for state governments, much of which derive more than half of their budgets from it.

Saint Elmo's fire is a luminous blue discharge of electricity sometimes seen when a thunderstorm.

Liquid lubricants contrast widely in weighing thickness, and boiling point.

Mary McDowell shared Jane Addam's interest in social work also was a loyal supporter of the League of Nations.

If laid out in straight line, the human digestive tract would measure approximately thirty foot in lenght.

For any adhesive to make a really strong bond, ... to be glued must be absolutely clean and free from moisture or grease.

Since prehistoric times, artists have portrayed subjects that representative their culture.

... unstable and explodes as a supernova is not known.

Scholars tend to cite 1831 as the started of the United States abolitionist movement

Although still underwater, Loihi Seamount, the newest Hawalian island, ... closer to the surface by frequent volcanic eruptions that add layers of lava to the island.

Mammals lose body heat to them environment in cold weather more quickly than in hot weather.

At birth, an infant exhibits a remarkable number of motor response.

Mahogany is often considered the finest cabinet wood because they has most of the qualities desired for furniture making

At a first the scientific method may appear to be a narrow and restrictive way of gaining understanding.

Calcium, the most abundantly mineral in the body works with phosporus in maintaining bones and teeth

The Appalachian Trall, extending approximately 2,020 miles from Maine to Georgia, is the longer continuous marked footpath in the world

Soil science begun with the formulation of the theory of humus in 1808

Common to North America, those cinnamon fern is found in wet places

The situation comedy has proved to a remarkably durable commercial television format.

Sea turtles date back 100 million year and are the only ancient sea reptiles to survive the present Day.