Human beings have used tools for a very long time. In some parts of the world you can still find tools that people used more than two million years ago. They made these tools by hitting one stone agai
As many as one thousand years ago in the Southwest,the Hopi and Zuni Indians of North America were building with adobe-sun baked brick plastered with mud. Their homes looked remarkably like modern apa
After the violent earthquake that shook Los Angeles in 1994, earthqua ke scientists had good news to report: the damage and death toll could have been much worse. More than 60 people died in this ea
A controversy erupted in the scientific community in early 1998 over the use of DNA (deoxyribonucleic acid ) fingerprinting in criminal investigations. DNA fingerprinting was introduced in 1987 as a m
I live in the land of Disney, Hollywood and year-round sun. You may think people in such a glamorous, fun-filled place are happier than others. If so, you have some mistaken ideas about the nature of
College costs vary quite a bit, depending upon the type of school attended. For example, at many of the more expensive private schools, annual costs (including tuition, room, board, books, travel to a
As the merchant class expanded in the eighteenth century North American Colonies, the silversmith and the coppersmith businesses rose to serve it. Only a few silversmiths were available in New York or
People have been painting pictures for at least 30,000 years. The earliest pictures were painted by people who hunted animals. They used to paint pictures of the animals they wanted to catch and kill.
Most earthquakes occur within the upper 15 miles of the earth's surface. But earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460
When I was growing up, the whole world was Jewish. The heroes were Jewish and the villains were Jewish. The landlord, the doctor, the grocer, your best friend, the village idiot, and the neighborhood