Bilingual Education in the United States Aside from Native Americans, there are no indigenous "Americans" to speak of in the United States. The U.S. is therefore a large immigrant nation whose history has grown out of its ability to bring...

any of a number of disease-producing agents—such as bacteria, viruses, rickettsiae, fungi, toxins, or other biological agents—that may be utilized as weapons against humans, animals, or plants. The direct use of infectious agen...

With the human genome already decoded, science is at the height of its ingenuity. Everyday, millions of scientists worldwide are working to find cure for varies illnesses and diseases. Some have changed the course of human evolution throug...

Witches have had a negative image for hundreds of years. Raymond Buckland, a witch himself, describes the popular conception of a witch as an old weather—beaten crone, having her chin and knees meeting for age, walking like a bow, l...

Infectious fever caused by the bacterium Yersinia pestis, carried by the rat flea. It usually spreads to humans only when the flea runs out of rodent hosts. It takes three forms. Bubonic, the mildest, has characteristic swollen lymph nodes...