NASA has devised a new plan for bringing samples of Mars to Earth for detailed analysis. A spacecraft (lower right) will land near the Perseverance rover (lower left), which will ferry the samples it's gathered to the lander. If Perseverance is unable to do so, however, two small helicopters (upper left) will fetch the samples. Once loaded, a small rocket (right) will launch from the lander and carry the samples to a waiting orbiter, which then will carry them to Earth. The plan calls for the samples to reach Earth in 2033. [NASA/JPL/Caltech]