When you covered the period of American history that saw settlers move westward, you likely read that bison were once abundant on the plains of the western states before they were nearly hunted into extinction.
Unfortunately, the animals didn't fare any better in Canada and as The Calgary Herald reported, the bison that once roamed Alberta's Banff National Park for 10,000 years were completely absent from the area for over a century.
But while it's unlikely that we'll see bison numbers rise to the 30 million that once existed before the over-hunting occurred, recent years have seen a small community of them return to the area for the first time in 140 years.
And from the sounds of things, it's starting to look like they never left.