<http://schema.org/url>
<http://www.mnn.com/earth-matters/space/stories/mars-rover-eats-dirt-to-id-minerals>
<http://www.mnn.com/earth-matters/space/stories/mars-rover-eats-dirt-to-id-minerals?magic_tabs_comment_callback_tab=0&referer=node%2F181062&args=a%3A1%3A%7Bi%3A0%3Bs%3A6%3A%22181062%22%3B%7D>