I watched the film yesterday. It was good, but not quite as good as the book IMO. Considering how scientifically accurate most of the book was, the film did not attempt to be as accurate. For example: There was more than one blackout storm. Even one such blackout storm is impossible in Mars. It was just dramatically necessary for the plot. The solar panels looked pretty, but unless I am mistaken, they were only half covered in solar cells. Surely NASA would use the most efficient solar modules available. There were clouds in the sky. The atmosphere was obviously far too thick. There was one point where Mark Watney repairs the HAB (living quarters) by taping a tarpaulin over the ripped out air lock. In a storm, the tarpaulin is seen being blown in and out by the storm. Surely impossible if the HAB is under pressure. There was no attempt to portray the lighter gravity on Mars. Regarding the sand storm that separated Mark Watney from the rest of the crew, I believe Andy Weir has said he was aware it was impossible, but that he could not think of another device. It's a shame. Might there be any? Earthquake, volcano, asteroid strike: they all seem rather improbable. When the HAB rips open owing to a weakness in one of the seams, all Watney's potatoes die. He can still eat them, but he cannot grow them any more. Is this the case? What would kill off the spores. In the film, the first potatoes were in a vacuum pack, so presumably it is not the lack of air that killed them. I suppose freezing might have killed them.