Mars is essentially one big desert, and what do you tend to find in deserts? Snakes. There’s a reason for this, so the European Space Agency-funded SERPEX project is conducting a feasibility study on how robot snakes could one day be used to explore the Red Planet.The NASA rovers from Sojourner on have revolutionized planetary exploration. Where the first landers were static platforms that would have missed a Martian army if it passed by beyond a hill, rovers can go where the science is. Unfortunately, as anyone who’s gone off-roading can tell you, unpaved terrain is not a very friendly place for wheeled vehicles and Mars is particularly unfriendly.