Why is a water buffalo on the cover of the next National Geographic magazine?

By now you’ve probably heard that a water tank in Yellowstone National Park is on the map as a major symbol of our changing world.

The National Geographic story is based on a book by an anthropologist, a documentary and a photograph.

And for that matter, so are some of the other stories that have popped up on the magazine cover.

The cover photo features a waterbuffalo, and the book by Michael Dickey says it’s the largest water buffalo in the world, measured by the weight of its stomach.

But are water buffalo really the biggest animals in the land?

Here’s our look at some of those issues.