16. The American Bison helped European settlers to colonize North America
Long before the arrival of European settlers, the American Bison made up an important part of the Native American diet. When the settlers arrived, Bison steak was once again on the menu, and helped fuel the settlers’ exploration. The tracks they’d used for thousands of years scarred the Great Plains, and gave Europeans ready-made highways to use. Many later became railroad tracks, as the enormous country took its modern form. On a more sinister note, the US government in the 19th century encouraged Bison hunting for sport to cut off a major part of the Native American diet.