The Great Wall of China was built over several centuries starting approximately 221 BC—its function was to protect the people living behind it from enemies attempting to invade from the other side. Prior research has shown that different parts of the wall were made with different materials—mostly rammed earth or stone.
Rammed earth is made by mixing organic materials with inorganic materials. Because of their nature, such materials are more susceptible to erosion. That has led to questions regarding how sections of the wall made with the material have survived for so many years. In this new effort, the researchers wondered if perhaps biocrusts may have played a role.
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Renowned long distance cyclist Heinz Stucke camps on the Great Wall Of China.
1989
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Cai Guo-Qiang (Chinese, 1957), Sunset at the Great Wall, 1987. Oil on paper, 24 x 27 cm.
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Our ancient ancestors left behind many amazing landmarks. Some of these iconic structures have survived for hundreds of years but took a fraction of that time to build.
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Simatai (Section of Great Wall) in Beijing, China
Taken by Gigi
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THE GREAT WALL OF BENIN - 1400 AD
The Guinness Book of Records (1974 edition) described the walls of Benin City and its surrounding kingdom as the world’s largest earth works carried out. Benin City walls were at one point "Four times longer than the Great Wall of China, and consumed a hundred times more material than the Great Pyramid of Cheops
For over 400 years the Walls existed, it protected the inhabitants of the kingdom, particularly, the traditions and civilisations of the Edo people until it was ravaged in 1897 by the British.
The walls which are four times longer than the Great Wall of China, are a combination of strong materials like ramparts and moats, which predated the use of modern earth-moving equipment and technology, and were used for defensive purposes.
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Great Wall of China, Beijing, China
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status of the Great Wall of China as one of the seven wonders of the world revoked as new, much bigger wall starts to form: The Paywall.
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