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Ancient Greek science is a modern term for the application of systematic inquiry into the individual, the world, and the universe, which began in Ionia in the 6th century BCE with Thales of Miletus (l. c. 585 BCE) and continued through the...

The Christian doctrine of the Trinity (from the Latin trinus, meaning "threefold") professes that there is one God, but three eternal and consubstantial persons (aspects): the Father, the Son, and the Holy Spirit. The Father is the God of...

The Near East is a modern-age term for the region formerly known as the Middle East comprising Armenia, Cyprus, Egypt, Iraq, Iran, Israel, Jordan, Lebanon, Palestine, Syria, and part of Turkey, corresponding to ancient Urartu, Mesopotamia...

Blitzkrieg ('lightning war') is a military tactic combining air and land forces deployed at speed against the enemy's weaker points while the rear lines are simultaneously disrupted by acts of sabotage and bombing. Speed, concentration, and...

The conquistadors, meaning "conquerors", were Iberian military adventurers who operated as the vanguard of empires in the 15th and 16th centuries by exploring areas of the world unknown to Europeans, defeating indigenous armies, and then...

Mesopotamian science and technology developed during the Uruk Period (4100-2900 BCE) and Early Dynastic Period (2900-1750 BCE) of the Sumerian culture of southern Mesopotamia. The foundation of future Mesopotamian advances in scientific/technological...

A sepoy was an Indian soldier in the armies of various states and European trading companies in the Indian subcontinent and then, from the second half of the 19th century, in the British Indian Army. Recruited from many different population...

The appearance of simple stone tools, widely known as Oldowan tools or the Oldowan industry, marked the beginning of our technological revolution. To our knowledge, these artifacts appeared around 2.6 million years ago in the savannahs of...

Chaco Canyon was the center of a pre-Columbian civilization flourishing in the San Juan Basin of the American Southwest from the 9th to the 12th century CE. Chacoan civilization represents a singular period in the history of an ancient people...

Thomas Jefferson (1743-1826) was an American lawyer, statesman, philosopher, and a Founding Father of the United States. A prominent figure of the American Revolution, he wrote the Declaration of Independence and later served as the first...