Consider the following statements regarding NASA’s Curiosity Rover:

1. Curiosity is a robotic rover that forms part of NASA’s Mars Science Laboratory mission.

2. Instead of using solar energy, Curiosity is powered by a device that generates electricity from the radioactive decay of plutonium.

3. It has discovered carbon-bearing minerals on Mars, providing strong evidence for the existence of a carbon cycle on the planet.

How many of the above statements are correct?