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A huge amount of ancient helium rises from the rocks beneath Yellowstone National Park each week — about enough to fill a Goodyear blimp. Scientists say it's due to a huge volcano underneath the park.

Caught in the shutdown, the National Park Service has closed all of its sites around the National Mall — all of them, that is, except the clock tower at President Trump's hotel.

Because of a change in the climate, giant sequoias have become more vulnerable to insects, disease and wildfire.

A rare white-colored buffalo calf was born in Yellowstone National Park this spring. It's interesting for tourists, but many Native Americans see it as the fulfillment of a prophecy.

Leaders of a Baptist church in North Carolina ousted the pastor after congregants started leaving. A secret tape provides a rare look at the debate when a message threatens a business model.

These descendants of wild boars were brought over from Europe decades ago. They're highly invasive and hugely destructive — threatening native bears and deer in Great Smoky Mountains National Park.

NPR's Rob Stein explains why covering vaccines is no longer routine science journalism, but a political battleground.

Scott talks with Donna Greenwald who just completed her goal of singing the national Anthem in all 30 of the major league baseball parks.

Scott talks to Robert Redford about the Sundance Film Festival, and the Sundance Institute, which he founded 20 years ago in Park City, Utah. The Sundance Film festival, which features works by low-budget, independent filmmakers, began this week.

With hundreds of thousands of federal employees furloughed or working without pay, some government offices are closed and facilities at National Parks aren't available.