Saturn's moon Iapetus may look completely devoid of life, but one UFO researcher believes it is home to alien beings. The shock claim is being made after a strange structure, believed to be at least five kilometres in length, was spotted on Saturn's third-largest moon.

Not only does one alien researcher claim to have spotted the structure on Iapetus, one of 62 moons which orbit the ringed giant Saturn, but added that NASA is attempting to cover up the evidence.