The number e, like the number pi, is a useful mathematical constant that is the basis of the system of natural logarithms. Its value correct to nine places is 2.718281828... The number e is used in complex equations to describe a process o...

More than a quarter century of publications testify to a diversity of concerns on the part of E. D. Hirsch, Jr. These manifold concerns include theory of interpretation, nature and development of hermeneutics, Romantic historical scholarsh...

(born Aug. 16, 1911, Bonn, Ger.—died Sept. 4, 1977, Romont, Switz.) German-born British economist. After studying in England and the U.S., he settled in England in 1937. During World War II he worked on theories for full-employment p...

1862-1932 American mathematician who, in addition to his important work in algebra and group theory, helped to found an American school of mathematics on equal terms with the superior scholarship of foreign universities. Under Moore'...

During the Edwardian years and into the 1920s, E. M. Forster consolidated his reputation as a novelist of distinction and as a persuasive man of letters. He attained the greatest recognition and authority after World War II when, except fo...

American biologist and geneticist who helped confirm some important aspects of population genetics. Early researchers in population genetics, Godfrey Hardy and Wilhelm Weinberg had developed relationships describing the distribution of gen...

An ironist and humorist par excellence, the prolific storyteller E. T. A. Hoffmann occupies a prominent place in the canon of nineteenth-century European literature. He is regarded today as the influential, eccentric genius of German Roman...

Most commonly called the eardrum, the tympanic membrane is an oval-shaped, thin, fibrous membrane that covers the ear canal separating the outer ear (external acoustic meatus) from the middle ear (tympanum). The tympanic membrane is bilami...

From the playgrounds of South Philadelphia in the early 1960s, through a 13-year career in the National Basketball Association (NBA), Earl "The Pearl" Monroe earned renown for his artistry on the court. Widely considered one ...

1907-1983 American chemist and inventor who revolutionized the plastics industry with the development and introduction of Tupperware, which he invented in the 1930s but did not produce until 1947 because of World War II. While a chemist at...

WEEK 8: DAY1. Identify: WHAT DID THE CHILDREN SAY? The main points of the childrens conversation were How does corn grow? How does popcorn pop I eat it with butter I put lots of salt on mine We plant them in our backyard ...

Like Christianity and Judaism, Islam is an Abrahamic religion based on prophecy, prophethood, and the revealed text. It began in sixth-century Arabia and spread rapidly to regions outside the Arabian peninsula. A hundred years after Mohamm...

It is the objective of the Earth Charter to set forth an inspiring vision of the fundamental principles of a global partnership for sustainable development and environmental conservation. The Earth Charter initiative reflects the convict...

EARTH FIRST! Earth First!, the best known among the so-called radical environmental groups, was founded in 1980 in the southwestern United States. With its slogan "no compromise in defense of mother earth," it underscored its...

The Mission to Planet Earth (MTPE), now officially called the Earth Science Enterprise (ESE), is a program of the National Aeronautics and Space Administration (NASA) of the U.S. government. The mission is to use spacecraft and space tec...

the fields of study concerned with the solid Earth, its waters, and the air that envelops it. Included are the geologic, hydrologic, and atmospheric sciences. The broad aim of the Earth sciences is to understand the present features and th...

For 12 days in June 1992, more than 35,000 environmental activists, politicians, and business representatives, along with 9,000 journalists, 25,000 troops, and uncounted vendors, taxi drivers, and assorted others converged on Rio de Jane...

Mixture of gases constituting the earth's atmosphere. Some gases occur in steady concentrations. The most important are molecular nitrogen (N2), 78% by volume, and molecular oxygen (O2), 21%. Small amounts of argon (Ar; 1.9&p...

Earthwatch is a non-profit institution that provides paying volunteers to help scientists around the world conduct field research on environmental and cultural projects. It is one of the world's largest private sponsors of field res...

Since emigration from China began at least a thousand years ago, most migrants have settled in Southeast Asia. At least three-quarters of the world's Chinese outside China reside in the region. However, Southeast Asian Chinese compr...

Chinese calligraphy (from the Greek kalligraphia, "beautiful writing") is the art of writing that educated Chinese have practiced for millennia. All students of written Chinese practice calligraphy, but becoming a good callig...

The East China Sea (Dong Hai) constitutes part of the Western Pacific. It is 1,296 kilometers long from the north to the south and 740 kilometers wide from the east to the west and covers an area of 790,000 square kilometers. In the north,...

principal festival of the Christian church that celebrates the Resurrection of Jesus Christ on the third day after his Crucifixion. The earliest recorded observance of an Easter celebration comes from the 2nd century, though the commemorat...

Chilean dependency in the eastern Pacific Ocean, the easternmost outpost of the Polynesian island world. It is famous for its giant stone statues. The island stands in isolation 1,200 miles (1,900 kilometres) east of Pitcairn Island and 2,...

EASTERN CHRISTIANITY. From the city of Jerusalem, the first Christian missionaries set out along the roads of the Roman Empire to the cities and villages of the Mediterranean world and beyond. Within only a few years after Christ, Christia...