Lewis and Clark gave a lot to us. They went to find more land. They found 300 species unknown to scientist. They also found 50 Indian tribes, and also rockies. They started along the Missouri river,and went along the ocean for about 100 miles. Then went in the Louisiana territory for a long amount of miles. Some where in there they found Sacajawea. She helped them do what they need to. When they argued she helped them. All of them are really important.THE END!!!!!!!!