The Curiosity rover is approaching its first half-marathon on Mars, and what a busy time it has been since it landed more than four and a half Earth years ago. Its travels to and around Mount Sharp have not been without their share of drama. In between its main science mandate of finding signs of ancient habitable environments on the Martian mountain, the rover has battled problems with its wheels.
As of Sol 1690 (a sol is one Martian day, approximately 24 hours and 39 minutes in Earth time), the rover has driven 10.14 miles in and around Martian terrain ranging from ancient stream beds, to active sand dunes, to bare bedrock. Observations in the past month have focused on "megaripples" that likely change regularly with the changing wind patterns on Mars. The rover has also done imaging of Phobos, a moon of Mars, to learn more about the tiny world's orbit.
You can see some of the latest images from the Curiosity rover in this slideshow, and follow along nearly sol by sol as members of the rover team describe their observations and challenges. The mission was originally slated for 2 years, but is now in its second extended phase and will go until at least September 2018.