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The UFO phenomenon consists of reports of unusual flying objects that remain unidentified after scientific inquiry. It first came to public attention in the UnitedStates in 1947, when a pilot reported seeing nine unusual objects flying in formation in the state of Washington. Since 1947, the U.S. federal government, private researchinstitutions, and individual scientists have collected data about the phenomenon. Although UFOs are not a phenomenon unique to the United States, Americanorganizations and private individuals have taken the lead in collecting, analyzing, and publishing sighting reports.http://www.answers.com/topic/unidentified-flying-object#ixzz26D18pfH4

The Nazca Lines are large animal and abstract geoglyphs made from rocks in a desert in northern Peru. Created by people of theNasca culture, the NascaLines were made between AD 400 and 650. Essentially, the lines were made by moving or turning desert-varnished rocks so that their lighter underside is visible.
Theresearcher most associated with the Nazca Lines is, of course,Maria Reiche, although Erich Von Daniken with his wacky ideas about alien landing zones comes a close second.Archaeoastronomer Anthony Aveni explored the possible meanings and uses of the lines in his 2000 book called Between the Lines. Aveni feels that possible interpretationsof the lines includes a solar or lunar calendar, art or religious significance, or roadways; probably all three.http://archaeology.about.com/od/nterms/g/nazcalines.htm
Loch Ness monster is a large aquatic animal supposed to resemble a serpent or plesiosaur of Loch Ness in Scotland.
www.thefreedictionary.com/Lochness+Monster