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).
Generally speaking, the wall measures about 23 to 26 feet tall. The fracture surface of the wall is ladder type with the base measuring about 7.1 yards wide and the top measuring 6.3 yards wide on average, which makes it firm and very unlikely to collapse.
One of the most striking sections of the Ming Great Wall is where it climbs extremely steep slopes in Jinshanling. There it runs 11 kilometers (6.8 mi) long, ranges from 5 to 8 meters (16 to 26 ft) in height, and 6 meters (20 ft) across the bottom, narrowing up to 5 meters (16 ft) across the top.