astroengine writes: "After repeated calls from NASA to wake up Mars Exploration Rover Spirit from its low-energy coma, mission control is beginning to realize the ill-fated robot may never wake up again. After getting stuck in a sand trap in Gusev Crater and then switching into hibernation in March, rover operators were hopeful that the beached Spirit might yet be saved. Alas, this is looking more and more unlikely. In a statement, NASA said: "Based on models of Mars' weather and its effect on available power, mission managers believe that if Spirit responds, it most likely will be in the next few months. However, there is a very distinct possibility Spirit may never respond.""