Along with their calendars -- the Tzolk'in, the Haab and the Long Count -- the Mayans also created their own math system. They used a series of dots and bars to signify numbers. One dot equaled one unit, while one bar equaled five units. A shell symbol signified zero.
Nullarbor is bounded in the west by the Western Australia-South Australian state border, in the south by the coastline adjoining the Great Australian Bight, to the east by the localities of Yalata and Yellabinna and to the north by the Trans-Australian Railway.ullarbor is located within the federal Division of Grey, the state electoral districts of Flinders and Giles, and the unincorporated area of South Australia.
Please try again later. Mount Tambora (or Tamboro) is an active stratovolcano on the island of Sumbawa, Indonesia. Sumbawa is flanked both to the north and south by oceanic crust, and Tambora was formed by the active subduction zone beneath it. This raised Mount Tambora as high as 4,300 m (14,100 ft), making it, in the 18th century, one of the tallest peaks in the Indonesian archipelago.