Jill Shinefield

Mars Curiosity. It could be NASA's last chance to set wheels down on Mars until the end of the decade: last August, a rover named Curiosity touched down inside Mars' Gale Crater, carrying 10 new instruments that will advance the quest for signs that Mars might have once been suitable for life. But Curiosity's mission is risky. After parachuting through the Martian atmosphere at twice the speed of sound, Curiosity will be gently lowered to the planet's...