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.
Follow @TIMENewsfeed. Experts once believed that the Great Wall of China only stood 5,500 miles long, but a new archaeological survey done by Chinaâs State Administration of Cultural Heritage says the Great Wall is more than double than that length. The report, released early June, estimates that the Great Wall extends 13,170 miles long and across 15 provinces.