There are so many interesting things to see and learn about units of the National Park System, so here’s the latest quiz and trivia piece with which to test your knowledge. Just how much do you really know about the parks and what’s in them?

The National Park Service has approved Yellowstone National Park’s plan for managing bison in the park, one that calls for an annual population ranging from 3,500-6,000 animals.

The hydrothermal explosion that rocked Yellowstone National Park's Biscuit Basin tossed rock blocks weighing hundreds of pounds short distances, sent steam and debris hundreds of feet into the air, and changed the personality of two hot springs, according to Yellowstone Volcano Observatory scientists.

A hydrothermal explosion rocked Tuesday morning rocked Biscuit Basin in Yellowstone National Park, sending a towering eruption of hot water, rocks, and other debris into the sky and sending visitors running.