NASA’S Mars rover Curiosity discovered this odd rock in the Red Planet’s Gale Crater six days ago.
There's no end to the earthly items that Red Planet UFO enthusiasts have "discovered" on Mars - a snake , a coffin , traffic light , cat , lizard , even a sasquatch , just to name a few. But, as Live Science reports, one rock that has piqued scientists' interest is a unusual dark-gray object that seems out of place with the rest of the reddish rock and dirt spread across the Martian landscape.