It is likely that aliens have visited earth

Alright, thanks Con. I will begin with an argument from reason. It is true that our universe is about 13.8 billion years old. http://map.gsfc.nasa.gov... It is also apparent that our universe has the capacity to support life. Since the Big Bang, the light from our universe has been expanding. So the light from the Big bang has traveled nearly 13.8 billion light years. This makes our universe amazingly big. Astronomers estimate that there are between 100 billion and 200 billion galaxies in the universe, and that there are at least 100 billion stars in our Milky Way galaxy alone. http://www.space.com... The amount of stars in the universe must be truly incredible. Since we know that there is a massive amount of stars in our universe, and that our universe definitely has the capacity to support life as we know it, the probability of extraterrestrial life existing else where in the universe is high. According to the Drake Equation, there could be anywhere "between 1000 and 100,000,000 civilizations in the Milky Way galaxy." http://en.wikipedia.org... There is so much potential for life outside of earth, and the universe is so old. Many extraterrestrial civilizations could have become advanced on their planets long before humans arose on Earth (even one million years before human civilization is small on the cosmic time scale). There is ample time in the past for extraterrestrials to develop interstellar travel technology. Technology advanced enough to travel to earth. UFOs I will not claim that all UFOs are of extraterrestrial origin. That would be ridiculous. Nearly 90 percent of all UFOs that have been seen have been explained. http://en.wikipedia.org... But the 10% still remain. There have been at least hundreds, in not thousands of unexplained UFO sightings. Some of the most famous are: The UFO incident over Washingotn D.C. in 1952 http://en.wikipedia.org... The Battle of Los Angeles http://en.wikipedia.org... The Phoenix Lights http://en.wikipedia.org... The Roswell Incident http://en.wikipedia.org... And many others as well http://en.wikipedia.org... There have also been many witness accounts of UFO abductions. And while some, if not many, may have been fabricated, it is lazy and unscientific to dismiss everyone of these accounts as hallucinations or fabrications. Indeed there are countless other accounts of abductions and UFO/alien sightings besides the ones told in this article. http://ufos.about.com... Many astronauts have also agreed with my view. Two of them are Edgar Mitchel of Apollo 14, and Gordon Cooper of the Mercury, Gemini, and Apollo missions. http://ufos.about.com... http://en.wikipedia.org... Many people of credibility, like Gordon Cooper, have also claimed that the government is indeed covering up the UFO phenomena. http://en.wikipedia.org... http://www.huffingtonpost.com... http://www.wanttoknow.info... With all of this information, I believe it makes a lot of sense. Aliens have come to earth, but the realization of their existence has been covered up by the government. I don't claim to know why the government is doing this, but I suspect it is because the public is not ready yet.