Five months ago, it landed on the Martian surface — and into our hearts. It gave us soil analysis data, photos of the sky from the red planet, and even hope of extraterrestrial life. Now, with its power deteriorating, its sunlight exposure shrinking, and Martian temperatures dropping to almost -100°C, the Phoenix lander's time may be up. Project manager Barry Goldstein admitted "we're towards the end," and Phoenix even bid us a fond goodbye on its Twitter page. But that's the charm of robots; they never truly die.