Articles

The invention of the telescope in 1608 is usually credited to the Dutchman Hans Lippershey. The astronomical telescope became one of the most important of all instruments during the Scientific Revolution when figures like Galileo (1564-1642...

The human body's system of blood circulation was discovered by the English physician and anatomist William Harvey (1578-1657) in 1628. Harvey determined the relationship between the blood system of arteries and veins and the regular contractions...

The rose that grows in many different forms in gardens all over the world today is an evolution of rose-like plants that lived in the northern hemisphere between 33 million and 23 million years ago. Traces of them have been found in the fossil...

The Battle of Wagram (5-6 July 1809) was one of the largest and bloodiest battles of the Napoleonic Wars (1803-1815). It resulted in a pyrrhic victory for French Emperor Napoleon I (r. 1804-1814; 1815) whose army crossed the Danube River...

The Battle of Aspern-Essling (21-22 May 1809) was a major battle of the Napoleonic Wars (1803-1815). It saw an Austrian army under Archduke Charles defeat a French army led by Emperor Napoleon I (r. 1804-1814; 1815) as it attempted to cross...

Greek mathematics, the study of numbers and their properties, patterns, structure, space, apparent change, and measurement, is said to have originated with Thales of Miletus (l. c. 585 BCE) but was clearly understood during the periods of...

The Battle of Friedland (14 June 1807) was a decisive battle of the Napoleonic Wars (1803-1815), fought by the armies of the French and Russian empires. A major French victory, Friedland caused the Russians to sue for peace, resulting in...

The Battle of Eylau (7-8 February 1807) was a bloody but inconclusive military engagement during the Napoleonic Wars (1803-1815). Fought on the snowy fields of Poland, the two-day battle resulted in a draw. Eylau marked the first serious...

Philo of Byzantium's On the Seven Wonders (225 BCE) is the first known list of the Seven Wonders of the Ancient World (though it may have been based on earlier works now lost). Philo's list differs from the standard Seven Wonders in replacing...

The twin battles of Jena and Auerstedt, both fought on 14 October 1806, marked a major turning point in the Napoleonic Wars (1803-1815). It saw the French Grande Armée, led by Emperor Napoleon I (r. 1804-1814; 1815) soundly defeat the Prussian...