Sorry if this isn't the right place for this post. Please do help me move this topic if necessary. I'm just a bit curious that the law of entropy states that the disorderness of a closed system will continually increase. However, the big bang theory says that the universe will expand until at some point, it will start contracting and thus big bang will occur again. Well doesn't this violate the law of entropy? If the universe can itself cluster all the galaxies together in some finite volume, then disorderness is decreasing. What's your thought on this?