Weighing as much as a small car, a rover named Curiosity rolls quietly around Mars. Scientific instruments pack its body and cluster at the end of a mechanical arm. An arrangement of lenses and instruments tops its mast, like a face. To the many NASA workers involved in Curiosity s mission on Mars, the rover is not simply a robot, but an astronaut bravely exploring an alien place. Curiosity s instruments collect data and its cameras take images of the Mars landscape, including self-portraits, in vivid color and detail. As it roams and explores, Curiosity will help find the answers to such age-old questions as has there ever been life on Mars? Could there be one day?

Danielle Smith-Llera grew up in coastal Virginia, hearing unforgettable tales about her Mexican and Irish ancestors. She first moved overseas to teach in international schools in Hungary and Brazil. Life in the U.S. Foreign Service has taken her around the world to live in India, Jamaica, Romania, Belgium, the United Kingdom, and Washington, DC. She loves sharing stories--fiction, nonfiction, and a mixture of both--in classrooms, museum exhibits, and, of course, books.