Taxonomy is the science of classifying organisms. The system currently used by taxonomists is called the Linnaean taxonomic system, in honor of Swedish biologist Carolus Linnaeus (1707 â 1778). The Linnaean system breaks down organisms into seven major divisions, called taxa (singular: taxon).
When used by the Chinese to protect their land, this section of the wall has had many guards to defend China's capita, Beijing. Made of stone and bricks from the hills, this portion of the Great Wall is 7.8 meters (25.6 ft) high and 5 meters (16.4 ft) wide.
Quick Answer. The main Great Wall of China stretches approximately 5,500 miles along the southern edge of Inner Mongolia. Explorer experts state that it takes 18 months to walk its entire length. It was constructed during the Ming dynasty in the 14th and 15th century, and is sometimes called the Ming Wall. Continue Reading.