Students examine the economic, health and environmental risks of being a one-crop country. They explain the risks of relying on one crop. They also identify the factors that resist change.

Before the American Civil War, the majority of hospital nurses or "stewards" were men. But the war created a medical crisis that demanded more volunteers, and a lot of the people who took up the call were women. Amid this desperate need...

The ritual grew as ownership of automobiles and then mass production of portable grills and plastic coolers soared. Tailgating before college and professional football games is an American tradition. Temporary tent cities pop up in...