True or False – Aliens review
Unidentified flying object (UFO), represent any observed phenomenon in the air which can not be determined. The term was coined in 1952 by the U.S. Air Force introduced to refer to a separate class of observations that remain unexplained chronic. The investigation is called ufology. Most UFOs later turn out to be ordinary natural phenomena or artificial light.
Since the late 40 years of the twentieth century the term UFO used as such, especially after Roswell accident, in an official press release was denounced as an observation balloon. Much later in the year 1990 , brought the U.S. Air Force in response to a letter written by Steven H. Schiff and directed to the GAO (Government Accounting Office), a new report in which he announced that the creatures which were found at the crash were actually weather balloons test dummies. These dummies were only developed in the year 1950, several years after the crash. The term flying saucer came into use after the description by the American businessman and pilot Kenneth Arnold of foreign objects that he saw at June 24, 1947.
In popular parlance, the term UFO is usually used to refer to spacecraft of aliens that came to visit Earth. There is no scientific evidence for the existence of extraterrestrial spaceships that are manufactured, although there are many people who claim the crew of a spaceship to be included. Read the rest of this entry »
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Three Gorges Dam
The Chinese Three Gorges Dam in the Yangtze is the world’s largest hydropower plant and dam. The construction began in 1994. Architectural terms, the construction was completed on 20 May 2006, but will not commence work until 2011.
The proponents point to a decreased risk of flooding, energy (hydro-electric power plant) and the improvement of IWT. Opponents point to a negative environmental impact, both upstream and downstream, and the negative socio-cultural impacts of the project.
The Yangtze is the third longest river in the world, and with a length of 6380 km the longest river in China. It flows from the Tibetan highlands through the three gorges to the Yichang -plateau and on to Shanghai where it flows into the sea. The catchment area includes nearly 2 million km ². It is also one of the main waterways of China. The idea of a dam was first proposed in 1919 by Sun Yat-sen.
The project has 26 generators which were put into service on July 10, 2003 for the first time. The total capacity is 18 G W, and will be 85 terawatt hours (85 billion kWh ) per year, about 3% of total consumption in China in 2006. The dam itself is 185 meters high and 2.3 kilometers long. There is provision for a lock system with two-way 5 row locks for shipping. Smaller vessels will have a boat lift that will be the largest in the world.
The reservoir behind the dam in the Yangtze from the beginning of the flooding in June 2003 that eventually a large reservoir will occur. The dam is 630 km long and will receive a surface area of one thousand square kilometers. Read the rest of this entry »
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