MTPR

Smithsonian Institute

There was a time when life on Earth almost blinked out. The "Great Dying," the biggest extinction the planet has ever seen, happened some 250 million years ago and was largely caused by greenhouse gases in the atmosphere. Now scientists are beginning to see alarming similarities between the Great Dying and what's currently happening to our atmosphere.

Scientists are highlighting that similarity in a new exhibit at the Smithsonian National Museum of Natural History in Washington, D.C.

Bison in Yellowstone National Park.
Josh Burnham (CC-BY-2.0)

Montana is known for tall mountains, deep valleys, and expansive forests, but most of the state is comprised of vast prairie landscapes that were once home to thundering herds of American bison. Scientists and historians believe that bison in North America numbered between 3 and 6 million prior to their government-ordered extermination in the late 1800s. Millions of bison were slaughtered simply for their tongues and hides.