Ooops… The sand that Oppertunity is stuck in is pretty neat stuff. It won’t stick to the wheels very well if its just rolling through thin parts but when it rolls through thicker areas of sand it will stick to the wheels like mashed potatoes on a fork!
NASA’s Opportunity Mars rover has run into a sandy snag. All of its six wheels have sunk in deep into a large ripple of soil.
Opportunity Mars Rover Stuck in Sand