Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Does alien exist? According to experts, the truth is out there! Latest news of December 2012: a UFO watcher has just uploaded a video on YouTube showing that a strange disc-shaped object was heading towards Houston and Texas. The video taker has even underlined that he sent the video clip to the Federal Aviation Administration to validate the sighting. It is essential to note that the video clip demonstrates a lighted, disc-shaped, flying object. In the meantime, the Ruiz' plane was on its way from La Guardia Airport towards Houston over the skies of Chicago, Illinois. The Ruiz' plane was also caught in the video. Researchers have advanced that the Unidentified Flying Objects have always been seen since the 74BC. Indeed, history has recorded that the Roman army Plutarch has witnessed a flame-like body fallen from the sky before the beginning of their battle against Mithridates VI of Pontus. Both armies have reported the sight of a wine-jar, silvery object...