On the first anniversary of its landing, halfway through its primary mission to Mars, NASA’s Curiosity rover still has a long way to go.

To be exact, 4.4 miles. That is the distance to the foothills of Mount Sharp, an 18,000-foot mountain whose rocks could provide clues to a time on Mars when life could have thrived.

Because Curiosity is driving at a careful pace — up to a 100 yards a day — the journey will take eight or nine months.

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