As the number of UFO-sightings around the world builds up, the mystery surrounding them intensifies. If the claims of UFO hunters are to be believed, Google Earth has shown evidence that UFO crash landing site exists. According to conspiracists, an image of an unusual pattern in the Antarctic snow is 'solid' proof of an alien landing. The image was shared by UFO spotters Secureteam10 on YouTube, which has once again sparked a heated debate on alien existence.