We've all heard the stories about alien life on Mars or UFO sightings on Earth.
But what about on other planets? Could there be life lurking in the shadows there, too? Mercury isn't usually considered an alien hot spot, but conspiracy theorists are convinced that something extraterrestrial is happening. In 2012, UFO Sightings Daily and Scott C. Waring reported a large rectangular opening on Mercury that Waring called a doorway. It was more than three miles long.
A new video from fellow alien-hunter Taylor Glockner, however, says that it's a shadow from an enormous structure.
Glockner explains, "As you guys are seeing, this is clearly a large rectangular building, the top and front of it is being hit by the sun, the back of the structure is in darkness and we have this very long shadow being cast down on the surface behind it."
He adds, "I know how shadows work as well as [how] natural formations react to the sunlight."
Whether it's a doorway, a monolith, or just a shadow, it's clear that we're not done searching for life on other planets.