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Who's Who in a Pirate Crew
It was all very well pocketing other people’s valuables and roistering at rum parties, but life on a pirate ship involved a surprising amount of hard work. Pirates were first and foremost sailors and in the Golden Age of Piracy (1690-1730...

Article
Harrison's Marine Chronometer
John Harrison (1693-1776) invented an accurate marine chronometer after several decades of research and development. While the pendulum clock had already been invented in the 17th century, a clock that could withstand the vagaries of the...

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Map of Polynesia
Map showing the Polynesian Triangle and some of its islands.

Article
Causes of the American Revolution
The American Revolution (c. 1765-1789) was a definitive event in Western history that saw the emergence of the United States and helped spawn additional waves of revolutions and societal upheavals on both sides of the Atlantic. Though the...

Definition
Astrolabe
The astrolabe is an astronomical instrument used from around the 6th century to measure time and position by determining the altitude of heavenly bodies like the Sun and certain stars. Measurements were taken in reference to the viewer's...

Definition
Louisiana Purchase
The Louisiana Purchase was a land deal made in 1803, in which the United States purchased 828,000 square miles (2,144,510 km²) of land west of the Mississippi River from France for $15 million, or an average of three cents per acre. The purchase...

Definition
SS Great Eastern
The SS Great Eastern was a steam-powered ship designed by Isambard Kingdom Brunel (1806-1859) which sailed on its maiden voyage from Liverpool to New York in June 1860. At the time, it was by far the largest passenger ship ever built, a record...

Definition
Robert Hooke
Robert Hooke (1635-1703) was an English scientist, architect, and natural philosopher who became a key figure in the Scientific Revolution. Hooke conducted his scientific experiments outside the auspices of universities, and he was a great...

Definition
Heinkel He 111
The Heinkel He 111 was a medium two-engined bomber plane used by the German Air Force (Luftwaffe) during the Second World War (1939-45). Heinkel He 111s contributed significantly to such campaigns as the Battle of France, the Battle of Britain...

Definition
Matthew Flinders
Matthew Flinders (1774-1814) was an English navigator and hydrographer. He was the first person to map the coastal outline of Australia in 1801-1803, following his circumnavigation of the 7.692 million square kilometres (2.96 million square...