A NASA satellite probe of Mars has discovered a large spherical object on the surface of the red planet. Conspiracy theorists believe the strange new pictures indicate that a civilization may have once been there.
According to the Daily Mail, the sphere was pictured lying on one of the ancient dried up lakes of the red planet by the Mars Reconnaissance Orbiter (MRO).
The NASA satellite has been taking images and videos of Mars from the orbit of the planet since 2005.
Alien hunters Mars Moon Space TV discovered the orb in the picture. In the image, the sphere casts a long shadow across the dusty surface of Mars.
In the zoomed video footage, the sphere is seen to be located on the edge of what is thought to have been a large water lake.
"The massive white spherical object is unmistakable," noted UFO YouTube channel SecureTeam10 in a video about the orb.
"As you look around the image you don't see anything else like this and that's why it stuck out like a sore thumb.
"From the shadow it's casting I would have to say that this thing is not only large but it may have some height to it, so we may have a tower structure here."
The orb, they say, may be a Martian "spherule." Also dubbed "blueberries" due to the blue hue the object emits in false-color images, Martian spherules were first discovered by the Mars rover Opportunity in 2004.
It's not the first time the strange sphere has been spotted on the surface of Mars this year.
One theory posits the sphere is formed when groundwater flows through porous rocks, triggering chemical reactions which cause the iron minerals to precipitate into small layered balls.
The sphere may also have been formed when molten rock was spewed into the air by a meteoric impact or volcano.
On Jan. 1, an image captured by the Mars rover Curiosity revealed a small dark sphere contrasting with the red rugged terrain on which it seems to be sitting.
Some observers called it a marble, but experts found it to be an example of a Martian spherule.
"A number of straightforward geological processes can yield round shapes," said Dr. Hap McSween, a University of Tennessee, Knoxville science team member.
The same ball emerged in a black and white image taken on Dec. 20, Martian dust notably covering the ball's surrounding rocks.
NASA's Curiosity rover has been taking pictures of the red planet's surface with its right mast camera since landing there in 2011.