'Curiosity' is a car sized rover that NASA has just landed on the surface of Mars as they try to find signs that life once existed on Mars.

The mission was unprecedented, and easily the most difficult landing that NASA has ever attempted.  The good news is that it was successful, and now the 'Curiosity' rover is sending back high def images from the surface of Mars.

Check out the gallery of pictures from NASA, including some history on the rover itself.

For those who aren't sure why landing this vehicle was so difficult, watch the video below and see what NASA means by '7 minutes of terror'.