NASA's Mars Curiosity rover had hardly touched down on the surface of the fourth planet from the sun when its cameras began sending back strange images - ones that some are calling evidence of unidentified flying objects, or UFOs.
One video (below) runs a particularly curious Curiosity image through a series of filters, revealing a number of UFO-type objects ... or whatever they are. Ever since the Mars Curiosity rover landed safely, theories have run rampant.
Alien spacecraft? Mere pixel anomalies? Something else? You decide:
Mars UFOs: The real deal?