John Ratcliffe said on Friday that an upcoming government report will reveal sighting of objects that "frankly engage in actions that are difficult to explain."
Researchers think the area around the rover's landing site was home to a river delta billions of years ago—making it a promising spot to search for signs of ancient microbial life.
Following Google's widespread service shutdown on Monday morning, users of the "free speech" social network proposed some outlandish possible causes.
"The UFOs have asked not to publish that they are here," Professor Haim Eshed said, "humanity is not ready yet."
Social media users are reacting to the news of an apparent federation of aliens by joking about the state of Earth.
Monoliths continue to appear across the world as the objects have recently been spotted on an English beach and in a Colombian field.
It's probably not aliens leaving the mysterious monoliths across the globe, but we can hope.
The Bureau of Land Management has said that the object was removed "by an unknown party."
The agency that administers the area said it has received "credible reports" the structure was removed "by an unknown party."
Cars stopped along Highway 21, with numerous people filming the mysterious shape flying in the distance.
Take a drive through Alien Country where there are more UFO sightings than at any other place on the planet.
Despite the secrecy and rumors surrounding this top-secret U.S. military facility in the Nevada desert, here are some things we do know about Area 51.
Scientists at Johns Hopkins University assessed the experiences of over 2,000 people who had taken the psychedelic drug.
"There is a reasonable chance that the planet hosts a large ocean underneath the atmosphere at pressures and temperatures similar to those in the Earth's oceans," researcher Nikku Madhusudhan said.
Dr Helen Sharman has publicly announced that she believes extraterrestrial life exists — and aliens might be among us on Earth right now.
"'Are we alone?' is one of the biggest unanswered questions," said study first author Howard Chen.
"We're all here today, so I don't think Independence Day happened yesterday evening," WFAA meteorologist Kyle Roberts told his viewers while explaining the crop circles on the weather radar.
Human's evolved through a series of highly unlikely events—so finding another intelligence like us would be like winning the lottery many times over.
"I can't believe we are the only living entity in the universe," Didier Queloz said
Data from the Cassini mission have revealed molecules in ice grains emanating from the icy, water-rich world.
It seems many Twitter users can't believe anyone actually showed up.
Area 51 has long been a target for conspiracy theories.
"Dear #Area51 raiders, 1. This is a terrible idea. 2. Make sure you spend all your money on fries before you go. 3. Zig-zag," one user wrote.
Cattle have been mutilated with precision-like surgery, with tongues and genitals removed, and not a trace of blood or any tracks that lead to clues.
Most Americans believe the governent is hiding something about UFOs, with the belief in extraterrestrial spaceships held by a substantial minority.
"In the search for life beyond our solar system, the most promising planets might not be Earth twins," says geochemist Stephanie Olson.
Warmer conditions on Ancient Mars increase the possibility that life developed there, according to researchers.
The sweepstakes winners will be announced on Friday.