Sightings or encounters with alien beings have been reported for centuries. The concept of humanoids who do not reside on Earth yet have very similar physical attributes and possibly superior technologies has long held our interest. To date, there have been nine different types of such aliens that range from Andromedans, the Flatwoods Monster, Greys, Hopkinsville goblins, little green men, Nordic aliens, Reptilians, Sirians, and Anunnaki. However, most modern encounters have been reported with “Greys”, such as the alien encounters surrounding Area 51.

When Air Force Lt. Col. Richard French was an alleged lead investigator of Project Blue Book in the 1950s, his job was to shoot down false reports of UFOs.

Given his job, French never dreamed he'd end up in Newfoundland one day watching what appeared to him to be two extraterrestrials performing repairs on a submerged, unknown circular craft.

It is conceivable that humans could someday discover aliens. We scour the cosmos looking for their radio signals, and though we're not capable of interstellar space travel, it is remotely possible that we could find what we're looking for right here in our solar system.

Life could theoretically exist on Mars, or on Europa, a moon of Jupiter, which appears to have an underground ocean. It's even possible (though highly unlikely) that these nearby life forms could be sentient. "It is consistent with current human exploration of the solar system that intelligent beings could have evolved in the deep oceans of Europa," said Jacob Haqq-Misra, an astronomer at Pennsylvania State University.

The White House has responded to two petitions asking the U.S. government to acknowledge formally that aliens have visited Earth and to disclose any intentional withholding of government interactions with extraterrestrial beings.

"The U.S. government has no evidence that any life exists outside our planet, or that an extraterrestrial presence has contacted or engaged any member of the human race," Phil Larson from the White House Office of Science and Technology Policy reported on the WhiteHouse.gov website."In addition, there is no credible information to suggest that any evidence is being hidden from the public’s eye."