• 1) "Extraterrestrial life is life originating outside of the Earth. It is the subject of astrobiology, and its existence remains theoretical. There is no evidence of extraterrestrial life that has been widely accepted by the scientific community. Many scientists believe that if extraterrestrial life exists, its emergence occurred independently, in different places in the universe. An alternative hypothesis is panspermia, which suggests that life might emerge in one location and then spread between habitable planets. These two hypotheses are not mutually exclusive. The study and theorization of extraterrestrial life is known as astrobiology, exobiology or xenobiology. Speculative forms of extraterrestrial life range from sapient beings to life at the scale of bacteria. Suggested locations that might have once developed or continue to host life include Mars, natural satellites of Jupiter and Saturn (e.g. Europa, Enceladus and Titan), and most recently Gliese 581 c, which is the only known extrasolar planet in its star's habitable zone and is predicted to have liquid water." Source and further information: 2) "Ancient astronaut theories are various proposals that the Earth has, at some point in its early history, been visited by intelligent extraterrestrial beings, and that such contact is linked to either the origins or development of human cultures, technologies and/or religion. Indeed, some of these theories suggests that gods from most -- if not all -- religions are actually extraterrestrial beings, and their technologies were mistaken for divine entities by primitive man." Source and further information: 3) "The abduction phenomenon is an umbrella term used to describe a number of hypotheses, claims, or assertions stating that non-human creatures (usually aliens) kidnap individuals—sometimes called "abductees"—usually for medical testing or for sexual reproduction procedures. Many such encounters are described as terrifying or humiliating, but others describe them as transformative or even pleasant. Reports of the abduction phenomenon have been made from around the world, but have perhaps seen most mainstream attention in the United States[citation needed]. Skeptics tend to doubt that the phenomenon occurs literally as reported, and a wide variety of alternate explanations have been proposed (see below). Rather, such skeptics often argue that the phenomenon might be characterized as a type of modern-day folk myth (like the historic belief in vampires)." Source and further information: 4) Further information: "Are We Alone? is the SETI Institute's weekly science radio program, hosted by Senior Astronomer Seth Shostak. The show covers a broad range of topics in the sciences as they relate to our understanding of the origin and evolution of life on Earth, and what life elsewhere in the universe might be like. Each week's show has a theme and allows scientists to share their latest findings and speculate on the implications for SETI and society in general."
    • Venus1485
      "Ancient Aliens" is a hoax, not a real theory,.
  • They might. If they did, I think they would be deep in the ocean somewhere.
  • Well, in my opinion, i think they do exist. I always thought they might have lived on Mars a long time ago. I mean, if aliens didn't exist, where did all these "stories" start from about them?
    • Venus1485
      People have imaginations and tell stories about many things that aren't real.
  • 1) Probably but we have no firm evidence either way. It would seem odd that out of the trillions of (likely) planets that exist in the universe life only exists here on Earth. 2) Probably not. There are good physical reasons why not (the distances involved and so forth) and there is no evidence for aliens visiting Earth despite numerous claims to the contrary. I don't buy "government conspiracies".
  • I believe that aliens exist and I do believe that they have been to Earth. I have seen two odd things in the night sky two different times. That isn't what make me believe in them though. I believe because people can't honestly think that Earth is the only planet in space that can support life. Our solar system is huge and there are more galaxies than just the one Earth is in. No one knows how deep space actually goes. There has got to be other planets that we have no knowledge of that exist and have life on them. I think that humans are either too ignorant or too scared to admit that there is other life, life that we don't understand, and it scares people to admit that there may actually be other life forms that are more advanced than humans in more than one way. Humans think that they are the most superior life form. Leslie
    • Venus1485
      There hasn't got to be anything. There's no solid evidence that ETs have ever been here.
  • Nobody knows. That's the same as asking if god exists. Some say yes some say no but bottom line there is no proof.
  • My family of Alien lifeforms, species DX352, exist and dropped me off on Earth in your year 1968.
  • That question is as unprovable as, "Is there a god."
    • we are dough 68
      Or, is the Earth square ?
  • Aliens from other nations definitely exist, but there is no evidence about ET aliens. They cannot come to Earth if they do in fact exist. Interstellar travel is just fantasy.. Fuel demands can never be met, and it is unfeasible to try to travel such immense distances.
  • not that i know of
  • Aliens are just things from other places, e.g. I'm from Italy, so I'm an alien in all other countries. As for aliens from other planets, there's no evidence for or against their existence. If they exist, they can't come to Earth. Interstellar travel is only fantasy.
  • its possible, ive just never seen one
  • I believe they do and would like more than anything to meet them. As long as no one else fond out. These crazy humans shoot first and ask questions later. I would not want anyone to get injured or discovered before they are ready to be found out. (if that ever happens)

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