Properties in Moscow, Reykjavik, New York City and its borough Brooklyn have been colour coded to not only show how populations have expanded, but also highlight the places within those cities that are still growing.
Alternatively, people interested in seeing the ages of buildings in just Brooklyn can use the Block by Block map.
One of its older Mongolian names was the "Black River", The Yellow River is one of several rivers that are essential for China's very existence.
At the same time, however, it has been responsible for several deadly floods, including the only natural disasters in recorded history to have killed more than a million people.
Terms such as "porcellaneous" or "near-porcelain" may be used for stonewares with porcelain-like characteristics.
Chinese ceramics range from construction materials such as bricks and tiles, to hand-built pottery vessels fired in bonfires or kilns, to the sophisticated Chinese porcelain wares made for the imperial court and for export.
Porcelain is so identified with China that it is still called "china" in everyday English usage.
The earliest Chinese pottery was earthenware, which continued in production for utilitarian uses throughout Chinese history, but was increasingly less used for fine wares.
Stoneware, fired at higher temperatures, and naturally impervious to water, was developed very early and continued to be used for fine pottery in many areas at most periods; the tea bowls in Jian ware and Jizhou ware made during the Song dynasty are examples.