The story of the two robot vehicles, Spirit and Opportunity, that were sent to explore Mars, lasting far past their projected lives of 3 months and sending back invaluable images of the environmentally hostile planet.

"Humans wanted to soar through the sky, and we did. We wanted to go to the moon, and we did. Then we set our sights on a little red planet, so far out we couldn't go ourselves. Instead, we sent a friend. We named her Opportunity because it means 'a good chance' and feels like hope. With nine eyes, three ears, one arm, and six wheels, Oppy explored the mysterious terrain of Mars, gathering samples, snapping photos, and discovering vast craters. Everywhere...