NASA is fighting to return samples from Mars. Here are the two ways they 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.

​ 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. Read More Breaking News, Latest News and Videos | CNN