In 1793 Eli Whitney invented a very important machine. It was the cotton gin. This very simple machine removes seeds from cotton plants at the least fifty times faster than a worker could by hand. Since several southern states had soil that was ideal for growing cotton and all of the new textile m...

When Franklin D. Roosevelt became the president of the United States in 1933, the nation's economy was in a state of turmoil. Industrial production slowed to about half its level prior to the depression, agricultural and other prices of goods fell to half of their previous value, and unemployment ju...

After Fulgencio Batista y Zaldivar seized control of the Cuban government in 1952, Fidel Castro became a leader of an underground antigovernment fraction. A Year later he was jailed for having led the 26th uprising against Batista. In 1955 he was released and went into exile in the ...

If the nation is serious about the manned exploration and development of space, then more attention must be focused now on research to study how weightlessness and reduced gravity would affect everything from power production to plumbing. The research is critical for the development of space-related...