New photos reveal several sizable holes in one of the wheels of NASA's Curiosity Mars rover, highlighting the toll that 12 years of scrambling across the Red Planet's harsh landscape have taken on the intrepid roaming robot.
Curiosity first touched down on Mars on Aug. 5, 2012 and was initially only expected to last for two years. But the hardy rover has defied expectations and has lasted 4,323 Martian days, or Sols, on the Red Planet, traveling more than 20 miles (32 kilometers) around the Gale Crater, where it originally landed.
