Discusses the scientific and philosophical theories and ideas that have been turning points in modern civilization, highlighting the key figures and cultural pe

There was a time when people assumed that the world was flat. Once an alternate theory was proposed, however, that conceit was challenged and, eventually, dispr

Describes the origins, development, and impact of inventions in communications, transportation, energy, engineering, medicine, warfare, measurement, agriculture

This is a study of the philosophers, thinkers, and scientists whose thoughts and ideas formed the Enlightenment of the seventeenth century and laid the foundati

There was a time when every voyage contained an element of the unknown. Today, however, the world spreads out before us carefully mapped and plotted. One must c