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William Harvey's Discovery of Blood Circulation
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...

Definition
King David
According to biblical tradition (and some say myth), David (c. 1035-970 BCE) was the second king in the ancient United Kingdom of Israel who helped establish the eternal throne of God. A former shepherd, David was renowned for his passion...

Definition
David I of Scotland
David I of Scotland reigned from 1124 to 1153 CE. Taking over from his elder brother Alexander I of Scotland (r. 1107-1124 CE), David continued to consolidate the kingdom of Scotland as a single nation, built castles and monasteries, and...

Definition
David IV the Builder
David IV the Builder or the Restorer (also known as Davit IV Aghmashenebeli) was the king of Georgia from 1089 to 1125 CE. His long reign was marked by a substantial revival of medieval Georgia, he regained much of Georgia's lost territory...

Definition
Alexandra David-Néel
Alexandra David-Néel (l. 1868-1969) was a world traveler, writer, and Buddhist spiritualist who wrote over 30 books on her journeys which took her 18,641.136 miles (30,000 km) around the world on foot or by various conveyances. Her works...

Definition
David II of Scotland
David II of Scotland ruled as king from 1329 to 1371 CE. Succeeding his father Robert the Bruce (r. 1306-1329 CE) when still a child, his early reign was threatened by the pretender Edward Balliol (c. 1283-1364 CE), son of King John Balliol...

Article
David & Goliath
As a youngster, David (the later king of Israel), slew Goliath, a giant, who was the champion of Israel’s enemy, the Philistines. "David and Goliath" became a metaphor for an underdog who nevertheless is victorious over a more powerful opponent...

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Statue of William Harvey, Folkestone
A statue of the English physician William Harvey (1578-1657) who discovered the circulatory system in 1628. Folkestone, England, where Harvey was born.

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Portrait of William Harvey
A c. 1627 portrait of the English physician William Harvey (1578-1657) who discovered the circulatory system in 1628. (National Portrait Gallery, London)

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William Harvey & Charles I
A painting showing William Harvey (1578-1657) demonstrating to King Charles I of England (r. 1625-1649) his theory of the circulatory system.