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Close-up of tobacco plants in Ontario, Canada. Tobacco, Nicotiana, cured leaves used after processing in various ways for smoking, snuffing, chewing, and extracting of nicotine.

7 of the World’s Deadliest Plants

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

Statue of Nostradamus

Nostradamus and His Prophecies

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

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music

Learn about this topic in these articles:

harpsichords

In keyboard instrument: Couplers
…the two rows, or “registers,” of unison jacks. This difference depends on the distance along the string at which it is plucked. The closer the plucking point is to the end of a string, the brighter is the sound; the farther away from the end that a string is…
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organ

In keyboard instrument: Italy
…and 2-foot pitch and a register called the fiffaro or voce umana (not to be confused with the French voix humaine or German vox humana, which are regals), a principal rank found only in the treble and tuned sharp so that when it is played together with the principale one…
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