There are also a number of other fascinating facts about natural Baltic Amber it floats in salt water but sinks in fresh water; its hardness measures 2.0-2.5 on the Mohs Hardness Scale; its density amounts to 0.96-1.096g/cm3. When amber is touched with fire, it produces an aroma of burning pine.
Location of Tanggu on a map. Tanggu is a city found in Tianjin, China. It is located 39.02 latitude and 117.65 longitude and it is situated at elevation 6 meters above sea level. Tanggu has a population of 535,298 making it the 2nd biggest city in Tianjin. It operates on the CDT time zone, which means that it follows the same time zone as Tianjin. Quick facts
In both eras, Chang'an was one of the largest cities in the world. Interestingly, the imperial courts of both empires sought refuge in Luoyang when Chang'an was attacked. At its height, the Tang Empire had about the same size of population as the Western Han Empire did at its height, about 50 or 60 million people. Like the Western Han Dynasty, the Tang Dynasty benefited from trade along the Silk Road trade routes and was influenced by contact with the West.