How did willows protect Silk Road caravans?
By Chelsie Vandaveer
August 6, 2002
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Suggested Reading—>Click here.
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In 221 BCE, Qin Shi Huangdi unified the feudal states of the loosely organized Zhou Dynasty. He brutalized the population, burned the literature, and silenced any criticism of his regime. Scholars were put to death outright or sent off to work on the Great Wall.
What became the Great Wall started during the Seventh Century BCE when vassal states of the Zhou Dynasty built walls for defense from nomadic tribes. Qin Shi Huangdi (literally First Emperor of Qin [chin] Dynasty) began consolidating these walls into the 10,000-li (5,000 kilometer) Great Wall.
The Qin Dynasty Wall consisted of dry-laid stone (where available) and tamped earth. The tamped earth portions of the Wall crumbled and required constant maintenance. Shi Huangdi ruled only eleven years. Upon his death the peasants revolted and the Great Wall fell into disrepair.
The Han Dynasty began in 206 BCE. The Han restored literature, art, and education--the first public school system. Trade was sought with West, particularly Rome. But much of the Wall had fallen; the Han and the trade caravans were under attack from the nomads. The Dynasty began repair of the Wall and added an additional 480 kilometers into the Gobi Desert.
The Gobi offered few building materials. Construction resorted to the tamped earth method with an improvement. Branches of red willow (Salix sp.) were laid in the soil and water added before tamping. In the dry environment, the willow reinforced the tamped soil. The Wall offered a haven to Silk Road caravans. The Wall's guarded outposts became wealthy trade centers.
When the Parthians blocked overland trade to the Roman Empire, the number of caravans along the Silk Road declined. After almost two hundred years, the western portion of the Great Wall and the trade centers were abandoned.
National Geographic has a fabulous photograph of a farmer plowing in western China. In the background are portions of the willow/tamped earth wall remaining after 2000 years. To view the photograph, click on the link:
http://www.nationalgeographic.com/ngm/0106/feature2/zoom4.html
Series: | 1 | | 2 |
killerPlants Tendrils: ~~1~~2~~3~~4~~5~~
Suggested Reading:
How did a daisy stop epidemics? Plants that Changed History - November 12, 2002
What flower caused China to lose Hong Kong? Plants that Changed History - July 15, 2001
How does the silkworm make silk? Renfield's Garden - December 5, 2001
Have pomegranate, will travel Plants that Changed History - June 4, 2002
What plant made mortar stronger than brick? Plants that Changed History - August 13, 2002
Guns, Germs, and Steel DVD & Book Set
National Geographic®
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As seen on PBS and based on the Pulitzer Prize—winning book by Jared Diamond, who traveled the globe for more than 30 years trying to answer one of the big questions in world history: Why is the world so unequal?
The answers he found—that the societies that developed food production techniques first were also the first to develop writing, technology, and government—were simple, yet extraordinary.
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Our DVD weaves together anthropology and science with epic historical reenactments that bring his fascinating theories to life. The DVD is also available with an updated version of the book with a new chapter.
Two-disc DVD set is 165 minutes long. Book is hardcover. 6 1/4" x 9 1/4". 528 pages. © 2005
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1421: The Year China Discovered America DVD
National Geographic®
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This special examines the theories outlined by Gavin Menzies in his best-selling book. An amateur historian and former submarine commander in the British Navy, Menzies poses an argument that could change the way we perceive global history forever—that Chinese admirals discovered America and Chinese junks first circled the earth.
Traveling across the continent, the film combines history, science and technology with adventure and exploration.
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Approximately 120 minutes.
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National Geographic Adventure Classics: My Life as an Explorer
National Geographic®
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Introduction by Anthony Brandt.
Over the course of three decades in the late 19th and early 20th centuries, Swedish geographer and explorer Sven Hedin traveled Central Asia's ancient Silk Road, along the way discovering lost cities, mapping uncharted rivers, and seeing more of ''the roof of the world'' than any European before him. Illustrated with 160 sketches by the author, this larger-than-life memoir captures the splendor of now-vanished civilizations, the excitement of unearthing ancient monuments, the chilling terror of snow-clogged mountain passes, the danger of infiltrating Tibet and of outwitting Torgut bandits, and the honor of close friendships with royalty from Peking to London.
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A worldwide bestseller in the 1920s and named one of National Geographic Adventure magazine's ''100 Greatest Adventure Books of All Time,'' the National Geographic Adventure Classics edition of My Life as an Explorer features an expedition map and exclusive reprints of articles Hedin wrote for National Geographic between 1897 and 1905. 160 illustrations. 496 pages. Softcover. 6'' x 9''. © 2003
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Silk Road Travel Jacket
National Geographic®
From the evening cool of the Moroccan desert to the windswept foothills of the remotest plateau, this travel jacket surrounds you in silken strength that rides to far-off places without adding weight or taking up space during passage.
Silk blended with long-staple cotton creates a fabric endowed with both superior strength and incredible softness, one that absorbs moisture to keep you cool in summer and warm in spring and autumn.
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Four exterior and two interior pockets carry plenty of personal cargo. Adjustable waist draw-cord. Zipper and button front. Dry clean. Imported.
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Marco Polo Gemstone Earrings
National Geographic®
Venetian explorer and trader Marco Polo was one of the first Westerners to travel the Silk Road, bringing European goods to Asia and returning with, among other things, precious gems. Here, the journey is embodied in garnet, peridot, amethyst, and granulated gold vermeil.
Renaissance designer Benvenuto Cellini's work for the Medici family is adapted by Chinese jewelers using faceted gems mined in India—true fusion of three cultures.
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Read more about Marco Polo's journey in Mike Edwards' 2001 series of articles for National Geographic magazine. 3/4''W x 1 1/2''L
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