This site describes how Computer Numerical Control (CNC) machines work and how they are used in computer-aided manufacturing (CAM).

At one time, humans, fueled by the animals and plants they ate and the wood they burned, or aided by their domesticated animals, provided most of the energy in use. All life operated within the fairly immediate flow of energy from the...

The military-industrial complex thrived in the North during the Civil War, but read about how inflation affected the ordinary worker. See how the role of women expanded to fill in for men who were away fighting. Women also had an impact...

The English cloak, though commonly adopted as the translation of these terms, conveys no accurate conception of the form, material, or use of that which they denoted. The article designated by them was always a rectangular piece of...

In the oratory of more thn two thousand years Demosthenes stands in the front rank, and will always hold first place among the orators of the ancient world. He was born in 384 B.C. When he was only seven years of age, his father, a...