If in doubt, this picture is a clear piece of evidence: https://upload.wikimedia.org/wikipedia/commons/c/cc/Bison_skull_pile_edit_2.jpg https://upload.wikimedi

If in doubt, this picture is a clear piece of evidence: https://upload.wikimedia.org/wikipedia/commons/c/cc/Bison_skull_pile_edit_2.jpg https://upload.wikimedia.org/wikipedia/commons/c/cc/Bison_sk...