Diving Bell
Long before the invention of modern scuba equipment, people used something called a diving...
Cities have been around for thousands of years; the first ones appeared in about 3,000 BC. Recently, however, we have witnessed the peculiarly modern phenomenon known as "megacities." A megacity is defined as an urban area with more than ten million inhabitants. In 1995, there were 14 megacities in the world. In 2015, there will be 21. By the year 2030, 60 percent of the entire population of the planet will reside in these vast urban settings. The growth of these megacities will be most pronounced in developing countries that have high rates of population growth and large populations of migrants in search of the opportunities cities offer. Today, the five largest cities are Tokyo, Mexico City, Sao Paulo, New York City, and Mumbai (formerly known as Bombay). In 2015, the ranking will be Tokyo, Dhaka, Mumbai, Sao Paulo, and Delhi. It is safe to say that in the future the quality of life for most people on the planet will depend upon the quality of cities.
Long before the invention of modern scuba equipment, people used something called a diving...
Most people know the name of the first man on the moon. His name is Neil Armstrong. Howeve...
Embalming is the act of preserving a body after death. Egyptologists believe that the anci...