Nāhuku lava tube in Hawaiʻi Volcanoes National Park is closed until further notice while geologists study its stability in the wake of movement of a large rock slab in the tube.

Beavers fueled an 18th and 19th century rush to the Western half of North America by mountain men, and veered towards extinction due to that, before making a comeback in the 20th century. Today, while many communities view the rodents as nuisances that dam creeks and chew down trees, the National Park Service is turning to these ecological engineers to revive wetlands in the National Park System.

Too many people hoping to glimpse a closeup of what is considered the world's tallest tree, located in Redwood National and State Parks, have prompted the National Park Service to resort to a $5,000 fine and possible jail time to discourage the experience.

Federal land managers are coordinating their management of paleontological resources on public lands, a process designed to improve not just protection of fossils but also to provide for a consistent approach in inventorying and monitoring these resources.