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Aristarchus of Samos (l. c. 310 - c. 230 BCE) was a Greek astronomer who first proposed a heliocentric model of the universe in which the sun, not the earth, was at the center. Although his theory was noted by other thinkers...

Black Kettle (Mo-ta-vato/Mo'ohtavetoo'o, l. c. 1803-1868) was a chief of the Southern Cheyenne who became famous as a "peace chief" – seeking peaceful relations with the US government – as opposed to war chiefs such as Roman Nose...

Jean-Paul Sartre (1905-1980) was a French existentialist philosopher who defined the existentialist movement in the 20th century. Considered the consummate intellectual, he was not only the author of philosophical works but also...

The Greek Alphabet developed from the Phoenician script at some point around the 8th century BCE. The earlier Mycenaean Linear B script, used primarily for lists and inventories, had been lost during the Greek Dark Age, and the...

Nineveh (modern-day Mosul, Iraq) was one of the oldest and greatest cities in antiquity. It was originally known as Ninua, a trade center, and would become one of the largest and most affluent...

Neith (aka Net, Neit or Nit) and is one of the oldest deities of ancient Egypt who was worshipped early in the Pre-Dynastic Period (c. 6000 - 3150 BCE) and whose veneration continued through the Ptolemaic Dynasty (323 - 30 BCE), the last...

Atlantis is a legendary city described by the Greek philosopher Plato (c. 429 – 347 BCE). Atlantis, a fabulously wealthy and advanced civilization, was swept into the sea and lost forever in a story which has captured the imagination...

Esoteric Buddhism is the mystical interpretation and practice of the belief system founded by the Buddha (known as Sakyamuni Buddha, l. c. 563 - c. 483 BCE). It is known by several names and is characterized by a personal relationship...

Viking ships were built by the Scandinavians during the Viking Age (c. 790 CE - c. 1100 CE) and were used both within Scandinavia and beyond for purposes ranging from being the most important means of transport to trade and warfare...

Shihab al-Din (also Muʿizz al-Din Muhammad ibn Sam), popularly known as Muhammad Ghori (r. 1173-1206 CE), was the Muslim ruler who laid the foundation for the subsequent Islamic ruling dynasties of India which saw its pinnacle...