Curiosity rover spotted what appeared to be a wooden spoon, floating in midair with a shadow on the ground beneath it. It was, of course, an optical illusion; the spoon is simply a rock, shaped by the wind over eons, also known as a ventifact. a ventifact is a rock or a stone that has one or more highly polished and flattened sides that is a direct consequence of sand or ice crystals driven by the wind. I like levitating spoon better.