UFO
Unidentified Flying Object (UFO), is an unknown origin, unknown nature, floating and flying objects in the sky. Means that as long as the eyes of the observer can not see or can not identify the unknown objects are called UFO. Many people will UFO as equivalent to high-tech or alien civilization UFO, Frisbee (English: Flying Saucer), Taiwan called UFO, UFO. Most people believe that it is from other planets of spacecraft or future people to today to do the Earth to do the study of the time machine, some people think it is atmospheric phenomenon. Many UFO photos have been identified as scams or misunderstandings by experts, but there have been some cases that can not be explained by existing scientific knowledge, such as the Phoenix Spot and the Washington UFO incident. Before the word UFO, there was only the term "UFO" in English, but it often caused misunderstanding. The 20th century began, the United States found above the plate flying objects, was called the UFO, that is the Soviet Union new reconnaissance weapons. This is the beginning of contemporary interest in UFO, and later people focus on the world's UFO reports. ...