Mammoth Cave, in central Kentucky, contains several subterranean lakes, rivers, and waterfalls.

Some critics claim that links between academics and biotechnology companies are a menace to unfettered research.

Though it can sense the slightest touch anywhere on the body, the brain itself is insensitive to pain.

The Titanic lies buried in its aqueous tomb.

Receptors for the sense of smell located at the top of the nasal cavity.

A good auditorium will assure that the sound is able to be heard.

Almost one half of the world's almonds are produced in California.

After twenty-two straight days of rain, the Illinois governor called out the National Guard to deal with the disaster.

The cacao tree, from whose seeds chocolate is made, flourishes in hot and humid climates.

In spite of his being tortured, the captured soldier did not reveal the location of the camp.