Earth, the third planet from the sun and the fifth largest planet in the solar system, is thought to be the only place where life exist. But how do we exactly know if we are the only ones in the solar system?
After scientists' observations and findings of the sky, many theories of life beyond us came to play in Earth's society: Galieo found planets, suns and moons, Copernicus concluded that the sun is the center of the universe, and Newton's discovery and calculations of gravity and motion on Earth and other planets. These scientists' theories were rejected at that time and they were punished to bring unacceptable views of how the world was created, objecting to religious beliefs. But observing space questioned whether other life forms existed in the universe. "Space is too big for just us to exist" (Thao, 2009), bringing controversy in this field. After the many findings of evidence in space and on Earth, questions of what it is and how did it get there came about.
As centuries flew, unusual events occurred with reports of people seeing objects that were flying in the sky at night, also known as UFOs (Unidentified Flying Object). On January 8, 2008, a guy named Allen from Autsin, Texas witnessed a stream of lights in the sky lined up horizontally as the sun sets, making no sound or noise. Allen thought "the jets looked like they were chasing the lights, and the lights seemed to be toying with them. It was like a 100-hp car trying to keep up with a 1000-hp one" from the Naval Air Base. He was freaked out on what he saw and reported to the Naval Air Base in case it was their base sending jets around the sky at night but they had nothing flying that night.
http://www.space.com/news/060622_alien_encounters.html
Besides seeing the typical UFO flying, there were findings of a magnetic signature in crop circles. An estimated 20% of crop circles show no evidence of being made by people, while 80% do (Andrews, 2000). Researchers such as Colin Andrews tried to measure the Earth's magnetic field in the corp circles but found that his electronic equipments and radio for determining the magnetic field, which perfectly worked fine before, did not work when using it for some unexplained reason.
However, there is always the possibility that people may be seeing things and assuming what they think is there, hallucinations, paranoia, etc. "It's because nobody, anywhere, has any actual facts concerning alleged UFOs, just claim," said Robert Sheaffer. With alien encounters, we find that often an explanation lies not necessarily in the skies but in our minds. Humans are pattern-seeking creatures, and our brains try desperately to make sense of things we don’t immediately recognize (Radford, 2006). ANd this results in an unsolved mystery in which many scientists seek from answers.
http://www.ufoevidence.org/documents/doc1752.htm
"UFO studies will continue until all the old cases have either been explained or admitted to being unexplainable-meaning a residue of sightings that could be ET related-and/or until people stop seeing unexplainable UFO-like events throughout the world," Maccabee concluded from the article UFO Research: Findings vs. Fact.
Other sources:
http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/980215e.html
http://www.ufoevidence.org/documents/doc1547.htm
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