We are fascinated with Mars, our neighbor in space so like Earth in some ways, and so utterly different in others. Two of NASA’s robotic rovers continue their decade-long quest for evidence that Mars was once much warmer, wetter, and more hospitable to life than it is today. J. Kelly Beatty, senior editor for Sky & Telescope magazine, leads an examination of the Red Planet from afar and up close, offering the latest updates on our current and future exploration of Mars and delving into the real odds of finding life there.