56, and that is only the magor volcanos inIndonesla
Bankers , merchants, and government builders in Rome belonged to the equestrian class.
The melting sea ice goes directly into the sea, causing sea level to increase
West Siberian Plain, Russian Zapadno-sibirskaya Ravnina, one of the world's largest regions of continuous flatland, central Russia. It occupies an area of nearly 1,200,000 square miles (3,000,000 square km) between the Ural Mountains in the west and the Yenisey River valley in the east.
There are four settled societies that each developed agriculture independently along major rivers that are traditionally considered the early river valley civilizations. The are the Mesopotamian civilizations, the Nile River civilizations, the Indus River civilizations, and the Yellow and Yangtze River civilizations.
