article_snippet.sent: But interestingly, the rover’s tracks are not visible - possibly because they have been swept away by the Martian weather.
article_snippet.sent: One interesting aspect is that the rover's tracks cannot be seen.
article_snippet.sent: And the absence of the rover’s tracks also hints at one of two possibilities.
highlights_snippet.sent: One interesting aspect is that the rover's tracks cannot be seen behind the rover's tracks in a distant image of Curiosity taken by the Mars Reconnaissance Orbiter .
  