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The ancient Persian military evolved from the earlier armed forces of the Medes which, in turn, developed from the warrior class of the indigenous people of the Iranian Plateau, the Aryan migrants (including the Persians) who later settled...

Galileo Galilei (1564-1642) was an Italian mathematician, physicist, astronomer, and natural philosopher. He created a superior telescope with which he made new observations of the night sky, notably that the surface of the Moon has mountains...

Xerxes I (l. 519-465, r. 486-465 BCE), also known as Xerxes the Great, was the king of the Persian Achaemenid Empire. His official title was Shahanshah which, though usually translated as `emperor', actually means `king of kings'. He is identified...

A hoplite (from ta hopla meaning tool or equipment) was the most common type of heavily armed foot-soldier in ancient Greece from the 7th to 4th centuries BCE, and most ordinary citizens of Greek city-states with sufficient means were expected...

The electrical telegraph was invented in 1837 by William Fothergill Cook (1806-1879) and Charles Wheatstone (1802-1875) in England with parallel innovations being made by Samuel Morse (1791-1872) in the United States. The telegraph, once...

The Supermarine Spitfire was a single-seater fighter plane, one of the most important aircraft of the Second World War (1939-45). Employed by the Royal Air Force in such crucial encounters as the Battle of Britain in the summer of 1940, the...

Roman philosophy played a significant role in the growth and development of Western thought. While not involved directly in the development of original philosophical thought, Rome made significant contributions in two ways: by conveying Greek...

The English Civil Wars (1642-1651) witnessed a bitter conflict between Royalists ('Cavaliers') and Parliamentarians ('Roundheads'). The Royalists supported first King Charles I of England (r. 1625-1649) and then his son Charles II, while...

Hel is the queen of the afterlife realm of Hel in Norse mythology. She is the daughter of the god Loki and giantess Angrboda and sister of Fenrir the wolf and Jörmungandr the World Serpent. Although often referenced as a goddess, Hel is more...

The Maasai (or Masai) people are an East African tribe who today principally occupy the territory of southern Kenya and northern Tanzania, and who speak the language of the same name. The Nilo-Saharan Maasai migrated southwards to that region...