The Perseverance rover has been collecting Martian rock samples since 2021, but NASA is still figuring out how to bring them back to Earth.
NASA hopes a revised plan will get Mars samples back to Earth faster and cost less than the agency's original plan.
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.
NASA announced Tuesday it may turn to Elon Musk's SpaceX or Jeff Bezos's Blue Origin to help reduce the soaring costs of ...