One of the greatest challenges for any manned Mars mission isn't surviving the planet itself, but remaining mentally sound on the way there -- you don't want to freak out during a months-long space voyage. And it looks like the producers behind the movie adaptation of The Martian are well aware of this practical reality. They've posted a teaser clip showing how the fictional NASA crew copes with 10 days of isolation training meant to simulate the disconnection they'll likely experience during the journey. As you'll see below, some of them handle it better than others. A few are practically itching to go on the expedition, while others clearly... suffered a bit. Why does Aquaman have control over whales?