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Introduction References & Edit History Related Topics

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Secret Service Agent Listens To Earpiece

Secret Service Code Names of 11 U.S. Presidents

Sailboat against a beautiful landscape

Which Waters Do You Pass Through When You “Sail the Seven Seas”?

The Lost Colony of Roanoke, North Carolina, where 115 people mysteriously disappeared c. 1590. John White discovers the word Croatoan carved onto a tree upon his return to the deserted Roanoke Colony in 1590

The Lost Colony of Roanoke

bird. mourning dove. pigeon and dove. Mourning Dove (Zenaida macroura) family Columbidae.

Nikola Tesla's Weird Obsession with Pigeons

Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)

6 Important Mughal Emperors

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Horses. Equus caballus. Horse stable. A brown horse looks out from his stall through the window.

Horsing Around: 7 of the Weirdest Racehorse Names in History

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Topics

mineral processing uraninite bauxite hematite laterite galena carnotite scheelite sphalerite banded-iron formation gossan placer deposit metallogenic province hydrothermal mineral deposit vein porphyry copper deposit nugget replacement deposit

Key People

Georgius Agricola.

Georgius Agricola

German scholar and scientist

Johan Vogt

Johan Herman Lie Vogt

Norwegian geologist

Quiz

James Watt as a young man, c1769. Scottish engineer and instrument maker. Invented the modern steam engine which became the main source of power in Britain's textile mills. His engine had a separate condenser in which steam from the cylinder; (see notes)

Weaponry, Energy, and Power Systems Quiz