Space/Science
http://a52.g.akamaitech.net/f/52/827/1d/www.space.com/images/080630-opportunity-mars1-02.jpghttp://a52.g.akamaitech.net/f/52/827/1d/www.space.com/images/080630-opportunity-mars2-02.jpghttp://a52.g.akamaitech.net/f/52/827/1d/www.space.com/images/080630-opportunity-mars3-02.jpgCliffs !