In this concluding video on the Lewis and Clark Expedition, Will discusses what the legacy of these two great explorers is. He comments on their discovery that the Northwest Passage was a figment of the imagination, but how they nevertheless sparked a massive fur trade rush. He tells how Clark mapped the West with incredible accuracy and created a resource used for decades, how their careful cataloguing and preservation of natural specimens was an immense scientific accomplishment, and how they discovered and documented much of the West's incredible species and beauty. He also discusses the death of Meriwether Lewis, and how Lewis's incomprehensible failure to publish the Lewis and Clark Journals led to many of their greatest scientific accomplishments going unrecorded for almost a century.