Even though the overall consumer price index did not change in April, indicating the absence of any general inflation or deflation, prices in several categories of merchandise have fallen over the last several months.

Over a range of frequencies from 100 to 5,000 hertz, monkeys and marmosets have a hearing sensitivity remarkably similar to humans, above which the sensitivity begins to differ.

Whether they will scale back their orders to pre-2003 levels or stop doing business with us altogether depends on whether the changes that their management has proposed will be fully implemented.

In 1974 a large area of the surface of Mercury was photographed from varying distances, which revealed a degree of cratering similar to that of the Moon's.

On the tournament roster are listed several tennis students, most all of which play as good as their instructors.

Of all the record companies involved in early jazz, the three most prominent were Columbia, Victor, and OKeh.

An analysis of tree bark all over the globe shows that chemical insecticides have often spread thousands of miles from where they were originally used.

Literacy opened up entire realms of verifiable knowledge to ordinary men and women having been previously considered incapable of discerning truth for themselves.

Nearly unrivaled in their biological diversity, coral reefs provide a host of benefits that includes the supply of protein for people, protecting shorelines, and they contain biochemical sources for new life-saving medicines.

Despite a growing population, in 1998 the United States used 38 billion fewer gallons of water a day when comparing it to the period of all-time highest consumption almost 20 years earlier.