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Do aliens exist? Fictional space aliens who have visited Earth range from the adorable (E.T. and his magical finger) to the threatening (the ruthless Martians of “The War of the Worlds”) to the helpful (mighty Superman was from another planet, as we sometimes forget).
Moreover, have aliens visited Earth? Whether extraterrestrial life has actually touched the soil of Earth — or floated above it, observing us all — has been a burning question for almost as long as humankind could look at the stars. The many claims of alien sightings, often buttressed by grainy photos of UFOs, and the many theories about outer space creatures already living among us could fill enough books to weigh down a spacecraft that’s collecting samples of our planet.
One thing is for certain: The public and private agencies that deal with all things space focus on finding life away from Earth. They are not researching, at least publicly, the scientific possibility of whether aliens have already been on our planet. For that matter, governments answer stories of UFO sightings on Earth by pointing to the weather or by saying the claim couldn’t be corroborated. There are no official records of aliens visiting Earth.
