I had previously seen The Martian but never thought much about the scientific accuracy of the movie. After watching it with a STEM major, I now know that it is completely plausible sending a botanist to space. This, however, seems completely unnecessary. I think NASA would rather teach the astronauts how to plant seeds or collect samples than send an inexperienced botanist who has no background in engineering or space. I consider that a major lapse in the plot. Furthermore, Mars only has about 30% of the gravity we have on Earth, so Mark Watney would not have been perusing his potatoes like that, he would have drifted away. Also, the scene where he performs surgery on himself is so out of this world to the point where it’s not credible. All of these errors coupled with the fact that the movie is a solid 2 hours of him blithely vlogging about his potatoes made this re-watch agonizing.