Life as we know it requires three ingredients: Water, energy and carbon. The missing piece so far is finding carbon. One of Curiosity's main tasks is to drive to the mountain, chisel rocks and dig into soil in search of the elusive element.
During its cruise to Mars, Curiosity turned on its radiation sensor and sent back data, which should help scientists better understand the risks that astronauts would face on a manned mission.
Before Curiosity can further explore, it must first stick the landing.
Weighing nearly 2,000 pounds, it is much heavier than Opportunity and can't bounce to a stop swaddled in air bags; it would break apart if it did. So engineers devised a new trick. Sunday will be the first time that the novel landing routine will make its debut.
Engineer Steve Sell said his eyes will be glued to his computer screen on landing day.
"I just have to keep reminding myself to keep breathing," Sell said.
Follow Alicia Chang's Mars coverage at: http://www.twitter.com/SciWriAlicia
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