NASA studies options to reign in cost of flagship Mars Sample Return mission
NASA hopes a revised plan will get Mars samples back to Earth faster and cost less than the agency's original plan.
NASA is fighting to return samples from Mars. Here are the two ways it might do it in the 2030s
NASA has arrived at two ways of returning samples collected on Mars to Earth. Now, the agency will test the options to see if the cache can make it back in the 2030s.