 in April. I'm Lisa Carton. A year-long NASA Mars mission simulation has come to an end. The four volunteers who took part in the project exited their sealed habitat at the Johnson Space Center in Houston on Saturday. They spent a total of 378 days living and working inside a 3D printed habitat dubbed Mars Dune Alpha. NASA will be using their experiences to plan for crewed missions to the Red Planet, which it hopes to begin launching in the late 2030s or early 40s. I'm Tammy Trujillo.