His photos appear frequently in National Geographic magazine. Following on last week's image of gentle eggs winning the prize, I was somehow drawn to this image of bison in South Dakota ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine ... Two of Yellowstone’s iconic species, bison and elk, spill seasonally—and naturally—beyond ...

Like cows, buffalo chew cud to further extract nutrients. Buffalo and bison aren’t the same animals. How the misnomer came to be is murky, but it’s thought early American settlers called bison ...