Here's why 'The Martian' author made one major exception to scientific accuracy

The Ridley Scott-directed and Matt Damon-starring space drama "The Martian" had humble beginnings as a serialized book published chapter-by-chapter on the software engineer author's blog. Author Andy Weir talks to HitFix about seeing Damon embody his MacGyver-esque protagonist, why he made one major exception to scientific accuracy in his novel, what the deal is with Jessica Chastain's character's disco obsession, and whether Watney's crew mates would have survived if they had been stranded on M...