I don't think it make sense at the end, I am going to allow everything they have shown, but they just need to be realistic a little bit, I don't understand the part where they travel from indus River to Ganga river, but if you follow the map where the mahenjodaro is, after crossing it if you want to go to Ganga you need to cross yamuna river too, but they forgot to include that, and I didn't mention about the total distance they had to cover to reach Ganga on foot, lol.