Is there life on Mars? Could humankind eventually colonize the red planet? NASA and other space agencies have been working to answer these questions for decades. From high-powered telescopes to the Mars rovers, the tools used to explore Mars are incredible pieces of technology. What they've discovered about Mars is even more amazing. Your readers will travel through the history of study of the fourth planet from the sun, including the missions to Mars so far and what modern scientists are doing to learn more.