Wow excellent post, very instructive especially for those who do not know the history. The rivers were the main sources of food and shelter for man, and I loved knowing part of the history of this majestic and great Missouri River. In my country Venezuela, we have the Orinoco River, which is the largest and one of the most important in South America, possessing a rich fauna among which are the anacondas and large caimans. Thank you once again, I am a faithful believer that every day you learn something new and today I had to learn and know about the Missouri River and I thank you for it.