On Tuesday at precisely 12:55 p.m. EST (17:55 UTC), Mars rover Curiosity successfully breached the crest of the dune in "Dingo Gap." The 1 meter-high dune stands between the rover and a smoother route to the mission's next science target.
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The raw image above comes from Curiosity's front-left Hazard Avoidance Camera (or Hazcam for short) on sol 533 (Feb. 4) of the mission, providing a snapshot of the moment when the rover's front left wheel reached the peak of the dune. Although there has yet to be official word from NASA Jet Propulsion Laboratory scientists, Curiosity appears to have conquered the upward slope of the Dingo Gap dune with ease. The timestamps on the raw imagery suggests the short drive up the sandy slope took around 25 minutes.
I've stitched together a rough animated gif of the dune drive below: