We all know rats can get in to pretty much any nook and crevice.
But who knew they could get into outer space? And settle down on Mars?!?
A photo taken in September by NASA's Curiosity rover appears to depict some kind of furry small creature.
"Note its lighter color upper and lower eyelids, its nose and cheek areas, its ear, its front leg and stomach," writes ScottCWaring, a contributor to UFO Sightings Daily, who first picked up on the abnormality.
Others believe this is merely a rock and, similar to the Hitler tea kettle on a recent J.C. Penny billboard, Waring is just seeing what he wants to see.
So take a close look yourselves, THGers, and decide: Rat or no rat?