UFOs

It will be very interesting and even scary to see a real UFO or a alien form another planet, but there has been only speculations and no proof that such creatures do exist. There are many questions and no answer regarding the existence of extraterrestrial life. Questions like: Does the government of the United States have proof unknown to the public about the existence of Unidentified Flying Objects (UFOs) or aliens from another planet? are one of many questions with no solid answer. There is the theory of the crash and the discovery of alien bodies and flying object in Roswell New Mexico for which there are numerous witnesses. There is also the mystery of area 51, but the government denies this claims. There is people from all aver the world and from all class levels that say to have seen a UFO or an actual alien walking in our planet and some people even claim they have been abducted by aliens from another planet. Now this is not something that just started, this theories have existed for centuries. Experts on this topic and astronauts have evidence stating that there is no life in any of the close planets but what about those planets we don't know of. There are evidence such as that there is the possibility that there was once life in mars due to the discovery of frozen water,the testimony of many people, pictures and home videos of flying objects and extraterrestrials, but this is not enough for many people; physical evidence is needed. If extraterrestrial with UFOs do exist then what would they want?