Earth is fast becoming a more crowded place — and it may become even more crowded than expected. According to a new projection of human population growth, there could very well be 12.3 billion people by century’s end, up to 2 billion more than some estimates. […]
“A rapidly growing population with bring challenges, said statistician and sociologist Adrian Raftery of the University of Washington. “But I think these challenges can be met.”
In a study published today in Science, Raftery and 13 other scientists analyzed new data provided by the United Nations on national trends in fertility, mortality, migration and age patterns.
The most recent UN estimates put the global population at 10.9 billion by 2100. Some demographers have, however, criticized that projection as excessively high. The projections also contained a great deal of uncertainty, with possible population scenarios of as many as 15.8 billion people, or as few as 6.2 billion.
That wide range was determined by calculating what would happen if women on average had 0.5 more or fewer children than expected. That’s not a bad rough guide, but is statistically rudimentary, failing to account for how those numbers will vary from country to country.
Raftery’s group took a finer grained look at the data, running population models on a country-by-country basis. “There is an 80 percent probability that world population, now 7.2 billion, will increase to between 9.6 and 12.3 billion in 2100,” they concluded.
Within that total, populations will level off in Asia and South America, where fertility rates have slowed considerably, but follow a very different trajectory in Africa, where fertility has not dropped as fast as expected.
The old Stockholm telephone tower (called Telefontornet in Swedish) was a metallic structure built to physically connect about 5 000 telephone lines in the Swedish capital.
In 1887, the Stockholms Allmänna Telefon AB ordered the construction of a tower allowing the connection of about 5 500 telephone lines. This quadrangular metallic structure, built in 1887 and 80 meters tall, was quickly judged ugly by the population. The company then asked the architect Fritz Eckert to carry out embellishment work. He is the one who designed the four angle towers.
But the tower is quickly revealed obsolete, because at the same time, telephone companies began to favor the burial of telephone cables. This project was accomplished by 1913 and the tower was now useless; From 1939, It is used as an advertising board for the telephone company. On July 23, 1952, a fire weakened the structure that was destroyed by security in 1953.
Paloma Gonzalez Rojas, WalkAcross, MIT, 2014
WalkAcross is an interactive installation that makes explicit the traces of human trajectories in space, seeking to build the memory of the space.
The understanding of space relies in motion, one might say, as we experience space by crossing it. When people move inside a space they leave an unseen trace that the interactive installation WalkAcross tracks and depicts in a light visualization. Every person trajectory is drawn in a different color from an aerial view, unveiling their own traces and interacting with them.
Source: MIT Architecture