How do you know so much about the expedition of Lewis and Clark?

Answer 1

To learn anything about anything, one should always go pick up a book. Check the author's credentials of course for accuracy, but books are an excellent source of just pure knowledge. It also helps, if you really want to delve deep into a subject, to find something about the subject that you like. Referring to Lewis and Clark, one can appeal to the "sense of adventure" or the time period itself, or the friendship and loyalty between Lewis and Clark and of course Meriwether Lewis and William Clark themselves. One can also appeal to Native American history. In any case, books and especially the Lewis and Clark Journals (which you can find online), written by the explorers, are an excellent source for learning about the expedition and its participators.