Overall, The Martian got the science pretty close to right and avoided the pitfall of turning astronauts into psychopaths or portraying NASA as a bunch of uniformly suited nerds with pocket protectors.  There are nits to be picked, of course.  Martian gravity was not accurately portrayed for obvious reasons of cost.  Winds are portrayed as having orders of magnitude more force than they would in Martian atmosphere, but it&#x27;s hard to make the setup work without that.  I can live with that.<p>The one thing that actually bothered me because it was a simple, dumb, mistake that had no real purpose or advantage for the film-makers was this:  The units used are all metric, as you&#x27;d expect for NASA, <i>except</i> for pressure, which is reported in psi on multiple interface screens and the hab cam dash.  Miles were also used in dialogue, but you can sort of justify NASA using miles to communicate with the American public. Myanmar and Liberia will probably abandon imperial before the U.S. finally does.