Curiosity is a special robot that NASA sent to Mars. It looks like a big car and is shaped like a box. It has six wheels so it can drive around the planet, six special instruments so it can take pictures and collect samples, and a powerful computer so it can store and process information. Curiosity's job is to explore Mars and help scientists learn more about the planet. It does this by driving around the planet, taking pictures, and watching for signs of life. By doing this, Curiosity helps NASA better understand the planet and tells us things that would be difficult to learn from Earth.