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Edmond Halley (1656-1742) was an English astronomer, mathematician, and cartographer. Halley's Comet is named after him since he accurately predicted its return in 1758. One of the early globetrotting scientists, Halley led several...

The lyre was a stringed musical instrument played by the ancient Greeks. It was probably the most important and well-known instrument in the Greek world. The lyre was closely related to the other stringed instruments: the chelys which...

The Stamp Act of 1765 was the first direct tax imposed on the 13 American colonies by the Parliament of Great Britain. It required the colonists to pay a tax on all printed materials including newspapers, legal documents, magazines...

Perdiccas (d. 321 BCE) was one of Alexander the Great's commanders, and after his death, custodian of the treasury, regent over Philip III and Alexander IV, and commander of the royal army. When Alexander the Great crossed the Hellespont...

The Townshend Acts were a series of acts passed by the Parliament of Great Britain between 1767 and 1768 to tax and regulate the Thirteen Colonies of North America. When the colonists considered the acts an abuse of power and protested...

Sumer was the southernmost region of ancient Mesopotamia (modern-day southern Iraq and parts of Kuwait), which has long been considered the cradle of civilization. The name comes from Akkadian, the language of the...

Joseph Haydn (1732-1809) was an Austrian composer of Classical music who is widely regarded as one of the greatest composers in history. Haydn spent most of his career around Vienna, where he pioneered the symphony and string quartet...

The Antonine Wall was the north-west frontier of the Roman Empire. Located in central Scotland, north of Edinburgh and Glasgow, the Wall was a linear barrier that stretched from the Firth of Forth near Bo'ness to the Clyde estuary...

The First Continental Congress was a meeting of delegates from twelve of the Thirteen Colonies of British North America that gathered in Philadelphia, Pennsylvania, from 5 September to 26 October 1774. Its primary purpose...

Hadrian's Wall (known in antiquity as the Vallum Hadriani or the Vallum Aelian) is a defensive frontier work in northern Britain which dates from 122 CE. The wall ran from coast to coast at a length of 73 statute miles (120 km...