People from different countries and professions have reported UFO sightings but still no substantial evidence have been found to claim these sightings to be true. Some people believe in UFOs and some still consider them as science fiction.
Here are some interesting facts about UFOs:
1. UFO is not the only term used to refer to these objects. The term Unidentified Aerial Phenomenon (UAP) is used as a broader term by investigators. Another term is OVNI - popularly used by Spanish, Portuguese, French and Italian.
2. People from different locations and professions have reported UFO sightings. As per ufoevidence.org 5 to 7 percent people in the world have seen UFOs and 10 to 15 percent people know someone in their contact who have seen a UFO.
3. So far, no UFO has been tracked on radar entering the Earth's atmosphere. As per the National Aviation Reporting Center on Anomalous Phenomena (NARCAP), some UFOs have unusual electromagnetic properties which disrupt microprocessors and adversely effect avionic systems.
4. There is a law in the US (under title 14, Section 1211 of the Code of Federal regulations, implemented on July 16, 1969) which makes it illegal for US citizens to have any contact with the extraterrestrials or their vehicles.
5. Pilot Kenneth Arnold is known to be the first person to report UFO sighting on June 24, 1947. As per the report, he spotted nine disc-shaped objects flying over Mt. Rainer, Washington. A reporter labeled them "flying saucers," and the term entered mainstream consciousness.
6. Flying Saucers from Outer Space was the first book to use the term "UFO". The book was written by Donald E. Keyhoe in 1953.
7. 12,618 UFO sightings were reported to Project Blue Book between year 1947 and 1969. Project Blue Book was a UFO research agency that was headquartered at Wright-Patterson Air Force Base. Even till date, 701 of these sightings remain 'unidentified'.
8. In the late 1930s, Orson Wells' radio show The War of the Worlds was so realistic that hundreds of people thought America was really been invaded by aliens and UFOs.
9. On August 15, 2013 the CIA finally acknowledged the existence of Area 51. This area and its surroundings are strictly off limits for public access. According to some videos and articles smuggled outside, living and dead aliens and spacecraft of futuristic designs were found on this land. But government still denies these claims.
10. According to some UFO aficionados, the Men in Black (MIBs) really do exist, and have been hammering on the doors of alien witnesses ever since the first appearance of flying saucers in 1947.
11. Area 51's nickname DREAMLAND was allegedly derived from an Edgar Allan Poe poem by the same name. It admonishes that "the traveler, traveling through it, may not-dare not openly view it; Never its mysteries are exposed, to the weak human eye unclosed".
12. Betty and Barney Hill had the first alien abduction. They claimed to have been taken by aliens from a New Hampshire road.
13. UFOs have inspired many clubs and organizations, such as the Mutual UFO Network (MUFON), the Center for UFO Studies (CUFOS), and the Fund for UFO Research.
14. The first photographs of a UFO were taken in 1883 by astronomer Jose Bonilla in Zacatecas, Mexico.
15. Most mainstream scientists consider UFOs (in their popular sense as extraterrestrial visitors) as so extraordinarily unlikely (though not impossible) as to deserve no investigation. [News Realities]
Photo by: Thinstock Images
This article has been contributed by Arpit Verma. An aerospace engineer by profession, Arpit likes to keep up with the ever increasing pace of technology. Deeply intrigued by the digital lifestyle, he is currently hanging out with his iPhone 5s and HTC One. You can catch him on twitter at @Ohnoarpco