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NASA recently announced that the rover has arrived at the base of Mount Sharp, a 3.4-mile-high mountain that Curiosity has been heading towards since July of 2013.

Curiosity was designed to travel a maximum of 660 feet per day and navigate difficult terrain on its six wheels. The Spirit rover traveled only 4.8 miles over its lifespan, although the still-active Opportunity rover has logged about 25 miles since 2003. Curiosity's path was rerouted earlier this year after scientists found that sharp rocks were poking holes in its wheels.

Mars almost definitely has water below its surface, and it’s possible that it might have life there too -- buried deep in the soil, where it’s protected from dryness, radiation and temperature extremes. Unfortunately, NASA doesn’t seem too interested in looking for it, preferring to look for "conditions" that might support life instead. But a group of aerospace and robotics engineers -- many of whom work for NASA, and one of whom even operates the Curiosity rover -- think NASA should be going with a more direct approach, and they're taking matters into their own hands.