Here's something I didn't know until 10 minutes ago: Andy Weir, the author of The Martian, used to work for Blizzard. He actually worked on Warcraft II.
And he did not have a good time.
Of all the literary genres to adapt to the big screen, "hard sci-fi" is arguably the trickiest. Get too fanciful with the fiction and your audience could lose its suspension of disbelief. Delve too deeply into the science and you risk putting everyone to sleep. Thankfully, The Martian -- based on the best-selling novel by Andy Weir -- traverses this tightrope with the assurance of a Michael Jackson moonwalk. It is Castaway for NASA nerds and the best movie Ridley Scott had directed in years. We just wish it had a few more quiet, reflective moments.