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.

The ongoing restoration of the Cape Hatteras Lighthouse relies on science, history, art, and patience.